The highly-skilled physicians at Guadalupe Regional Medical Center keep abreast with the latest advancements in medical science and work to build relationships with patients based on trust and comfort. Download a poster of our physicians here.

Yoga, Prameela

 

Address 1215 E. Court
Seguin, TX 78155
Phone (830) 379-2411
Medical School Sri Ramachandra Medical College and Research Institute—Chennai, India
Residency Hill Crest Medical Center and Clinic—Tulsa, OK

Dr. Yoganandan, often called Dr. Yoga by her patient in the states, brings a comprehensive medical background in Emergency Medicine as a hospitalist here at GRMC. Upon completion of her residency, she gained extensive experience in office procedures, UCC, labor and delivery, C-sections and GI endoscipies.

Anesthesiology

Major, Dolores MD

Major, Dolores, MD
Address 1215 E. Court
Seguin, TX 78155
Phone (830) 379-5867
Medical School UTHSC, San Antonio, TX
Internship Pediatrics-University Hospital, San Antonio, TX
Residency Anesthesiology-University Hospital, San Antonio, TX
Board Certification American Board of Anesthesiology

Dr. Major is a staff physician at the Anesthesia Associates of Seguin and was a former Captain in the U.S. Air Force. Her honorable dedication in the military carries on as she continues to serve her region and the GRMC Hospital Board.

Mayhorn, Ronald MD

Address 1215 E. Court
Seguin, TX 78155
Phone (830) 379-5867
Medical School UTHSC, San Antonio, TX
Internship Pediatrics-University Hospital, San Antonio, TX
Residency Anesthesiology-University Hospital, San Antonio, TX
Board Certification American Board of Anesthesiology

Dr. Ronald Mayhorn has been a staff physician at Anesthesia Associates of Seguin since 1987. At GRMC, Dr. Mayhorn holds the position of Chief of Anesthesia and Medical Center Director.

Piña, Daniel MD

Address 1215 E. Court
Seguin, TX 78155
Phone (830) 379-5867
Medical School UTHSC, San Antonio, TX
Internship UTHSC, San Antonio, TX
Residency Anesthesiology-UTHSC, San Antonio, TX
Board Certification American Board of Anesthesiology
Additional Language(s) Spanish

Dr. Daniel Piña has been a staff physician at the Anesthesia Associates of Seguin since 2004. Dr. Piña completed both his residency and internship in San Antonio- where he later served as a Clinical Assistant Professor.

Wenzel, Michael MD

Address 1215 E. Court
Seguin, TX 78155
Phone (830) 379-5867
Medical School University of Texas Health Science Center of Houston
Internship Pediatrics-University Hospital, San Antonio, TX
Residency Anesthesiology-University Hospital, San Antonio, TX
Board Certification American Board of Anesthesiology

Prior to joining Anesthesia Associates, Dr. Wenzel taught Anesthesia at University of Texas Health Science Center at San Antonio.

Cardiology

Bose, Rahul MD

 

Address

 

515 E. Court, Suite 300
Seguin, TX 78155
  

Phone (830) 401-4880  

Canales, John MD

 

Address

 

515 E. Court, Suite 300
Seguin, TX 78155
  

Phone (830) 401-4880   

Casey, Christopher MD

 

Address

 

944 S. State Hwy 123 Bypass
Seguin, TX 78155
 

Phone (830) 379-1666

Craig, William MD

 

Address

 

1110 N Sarah Dewitt Dr.
Gonzales, TX 78629
Gonzales, TX 786291110 N Sarah Dewitt Dr.Gonzales, TX 786291110 N Sarah Dewitt Dr. 

Phone (830) 401-4880   

Garcia, Ronnie MD

Address 515 E. Court, Suite 300
Seguin, TX 78155
1626 E. Common St.
New Braunfels, TX 78130
Phone (830) 401-4880 (Seguin)
(830) 620-1272 (New Braunfels)
Medical School UTHSC, San Antonio, TX
Internship Portsmouth Naval Hospital
Residency Internal Medicine-Portsmouth Naval Hospital
Fellowship Cardiology-National Naval Medical Center
Board Certification American Board of Internal Medicine/Cardiovascular Disease

http://www.nbcardio.com

Dr. Garcia has a special interest in non-invasive imaging modalities, including CT Coronary Angiography. He strives to provide comprehensive health care through preventative cardiology and early treatment.

Gurram, Nandkishore MD

Address 519 N. King, Suite 104
Seguin, TX 78155
Phone (830) 549-5074
Medical School Osmania Medical College, Hyderabad, Andhra Pradesh
Residency Wrightstate University-Dayton, OH
Fellowship Cardiology and Interventional Cardiology-Ohio State University
Board Certification American Board of Internal Medicine/Cardiovascular Disease and Interventional Cardiology
Additional Language(s) Spanish

Dr. Gurram helps GRMC patients with their cardiovascular needs, using nuclear cardiology, cardiovascular ultrasound, stress tests and the 64-Slice CT scan to coordinate efficient, complete and compassionate care. Dr. Gurram also provides peripheral vascular interventions at GRMC.

Rossbach, Mario MD

 

Address

 

515 E. Court, Suite 300
Seguin, TX 78155
  

Phone (830) 401-4880  

Sokolyk, Stephen MD

Address 944 S. State Hwy 123 Bypass
Seguin, TX 78155
1583 E. Commerce #105
New Braunfels, TX 78130
Phone (830) 379-1666 (Seguin)
(830) 608-0512 (New Braunfels)
Medical School University of Southwestern Medicine College
Residency Internal Medicine-Hennepin County Medical Center
Fellowship Cardiovascular Disease-Medical College of Wisconsin & Critical Care-Hennepin County Medical Center
Board Certification American Board of Internal Medicine/ Cardiovascular Disease
Additional Language(s) Spanish, German, Ukrainian

http://www.havit.com

A GRMC physician since 1998, Dr. Stephen Sokolyk is a member of the Alpha Omega Alpha Honor Medical Society and has extensive experience with acute care services for cardiology patients. He is also a fellow of the American College of Cardiology.

Wilson, Michael MD

 

Address

 

1110 N Sarah Dewitt Dr.
Gonzales, TX 78629

Phone (830) 672-3845  

Yoho, Jason MD

 

Address

 

515 E. Court, Suite 300
Seguin, TX 78155
  

Phone (830) 401-4880  

Ear, Nose & Throat

Hennessee, Jennifer MD

Address 1344 E. Walnut
Seguin, TX 78155
Phone (830) 379-0299
Medical School UTHSC, San Antonio, TX
Internship General Surgery-UTHSC, San Antonio,TX
Residency ENT-UTHSC, San Antonio,TX
Board Certification American Board of Otolaryngology- Head and Neck Surgery

http://www.guadalupeent.com

Dr. Hennessee uses the latest technology at GRMC to perform Balloon Sinuplasty, a procedure that helps patients overcome sinus and voice concerns and disorders. Her other medical interests include thyroid and parathyroid surgery, facial skin cancer surgery and reconstruction, and general pediatric and adult ENT needs

Mullen, Brooks MD

Address 908 E. Court, Suites 2 & 4
Seguin, TX 78155
Phone (830) 372-0307
Medical School UTHSC, San Antonio, TX
Residency UTHSC, San Antonio, TX
Board Certification American Board of Otolaryngology- Head and Neck Surgery
Additional Language(s) Spanish

A GRMC physician since 1986, Dr. Mullen’s services include nasal and sinus disorders, allergy testing/treatment, ear disorders, voice and swallowing disorders and hearing aides. Dr. Mullen is a fellow of the American College of Surgeons and fellow of the American Board of Otolaryngology.

Emergency Medicine

Rotts, Michael MD

Address 1215 E Court
Seguin, TX 78155
Phone (830) 401-7335
Medical School Louisiana State University Health Science Center
Internship Earl K. Long Memorial Hospital
Residency Earl K. Long Memorial Hospital
Board Certification American Board of Emergency Medicine

Vaughan, Richard MD

Address 1215 E Court
Seguin, TX 78155
Phone (830) 401-7335
Medical School University of Texas Medical Branch
Internship John Peter Smith Hospital
Residency John Peter Smith Hospital
Board Certification American Board of Emergency Medicine
Additional Language(s) Spanish

Carriker, Curtis MD

Address 1215 E Court
Seguin, TX 78155
Phone (830) 401-7335
Medical School Texas Tech University Health Science Center
Residency Emergency Medicine-Duke University Medical Center
Board Certification American Board of Emergency Medicine
Additional Language(s) Spanish

Moreland, Gavin MD

Address 1215 E Court
Seguin, TX 78155
Phone (830) 401-7335
Medical School Louisiana State University
Residency Maricopa Medical Center
Board Certification American Board of Emergency Medicine

Family Practice

Boullioun, Susan MD

Address 113 E. Cedar
Seguin, TX 78155
Phone (830) 303-3500
Medical School Texas Tech University Health Science Center
Internship Family Practice-Baptist St. Anthony Hospital, Amarillo, TX
Residency Family Practice-Baptist St. Anthony Hospital, Amarillo, TX
Board Certification American Board of Family Medicine
Additional Language(s) Spanish

As a specially trained GRMC family practitioner since 2000, Dr. Boullioun is able to care for family health care needs in all stages of life.

Flores, Antonio MD

Address 214 N. Camp Street
Seguin, TX 78155
Phone (830) 379-8811
Medical School Baylor College of Medicine
Internship Family Practice-John Peter Smith Hospital
Residency Family Practice-John Peter Smith Hospital
Fellowship Geriatrics-John Peter Smith Hospital
Board Certification American Board of Family Medicine and Geriatric Medicine
Additional Language(s) Spanish

Dr. Flores is the only physician practicing in Seguin who has completed a fellowship in geriatric medicine. While at John Peter Smith Hospital, he was chief resident of the Family Practice Residency Program.

Rider, David MD

Address 519 N. King, Suite 102
Seguin, TX 78155
Phone (830) 379-7901
Medical School University of Texas Medical Branch at Galveston
Residency Waco Family Medicine Practice Program in Waco, TX
Board Certification American Board of Family Medicine
Additional Language(s) Spanish, Portuguese

http://guadalupefamilyhealth.com

Dr. Rider has contributed to publications and articles on topics ranging from teenage pregnancy prevention to the relationship between doctors and the pharmaceutical industry. Some of Dr. Rider's professional accomplishments include being chosen as a "Future Leader of Family Medicine" by the American Board of Family Medicine and his selection into the Gold Humanism Honor Society.

Rinn, Phillip MD

Address 519 N. King, Suite 105
Seguin, TX 78155
Phone (830) 372-0994
Medical School UTHSC, San Antonio, TX
Internship Family Practice-John Peter Smith Hospital
Residency Family Practice-John Peter Smith Hospital
Board Certification American Board of Family Medicine

Dr. Phillip Rinn is Chairman of the Guadalupe Healthcare Network and has practiced medicine at GRMC since 1984. With extensive experience in Family Medicine and Obstetrics, Dr. Rinn delivers efficient care to each patient.

Sullivan, Linda DO

Address 1350 Walnut St
Seguin, TX 78155
Phone (830) 379-5200
Medical School University of North Texas Health Science Center (UNTHSC), Ft. Worth, TX
Internship McClennan County Medical Education and Research Foundation
Residency McClennan County Medical Education and Research Foundation
Board Certification American Board of Family Medicine

http://www.liveoakfamilyhealth.com

Dr. Linda Sullivan is committed to providing quality health care. She was the Chief Resident during her residence program in Waco, Texas and was commended for her leadership role in the Rural Track for Family Medicine Program at UNTHSC.

Hartfiel, Arlynn MD

Address 519 N. King, Suite 103
Seguin, TX 78155
Phone (830) 372-1980
Medical School University of Texas at Houston
Residency Family Practice-McLennon Co. Med. Education and Research Foundation, Waco, TX
Board Certification American Board of Family Medicine

Dr. Hartfiel has been a quality GRMC physician since 1980. Dr. Hartfiel is the Medical Director of Guadalupe Regional Hospice and provides quality care for patients at GRMC and his private practice.

Raetzsch, Thomas MD

Address 1025 N. Austin
Seguin, TX 78155
Phone (830) 379-1184
Medical School Texas Tech University
Internship Family Practice-Central Texas Medical Foundation Brackenridge Hospital, Austin, TX
Residency Family Practice-Central Texas Medical Foundation Brackenridge Hospital, Austin, TX
Board Certification American Board of Family Medicine

http://www.nuyuseguin.com

Dr. Thomas Raetzsch began his private practice in Seguin, Texas in 1986 and has been a staff physician at GRMC since 1984. In addition to his commitment to patient care, he is a member of the Alpha Omega Alpha Medical Honor Society. He prides himself with helping patients overcome a broad range of health issues.

Rider, James DO

 

Address

 

519 N. King St. Suite 102
Seguin, TX 78155
  

Phone (830) 379-7901 

Talbot, Nicole DO

Address 515 N. King St., Suite 103
Seguin, TX 78155
Phone (830) 372-5200
Medical School Des Moines University – Osteopathic Medical Center
Residency Rapid City Regional Hospital Family Medicine
Board Certification American Board of Family Medicine

http://www.seguinfamilymedicine.com

Nicole Talbot, DO, FACP provides quality services that include natural hormone replacement therapy, family medicine pediatrics, geriatrics and women’s health care. She is able to recognize and ensure the exact care for each patient.

Zincone, Dean MD

Address 1355 E. Court
Seguin, TX 78155
Phone (830) 401-4401
Medical School University of Toronto
Internship Toronto East General Hospital
Additional Language(s) Spanish

http://www.dzinconemd.com

Dr. Dean Zincone has held his private practice in Seguin since 1994. He specializes in adult, child & family medicine, preventative medical care, minor emergencies, on-site diagnostic testing and physicals for school, sports and employment.

Gastroenterology

Tsen, Tony MD

Address 911 S. Hwy 123 Bypass
Seguin, TX 78155
Phone (830) 372-9042
Medical School UTHSC, San Antonio, TX
Internship Internal Medicine-Washington University Medical Center
Residency Internal Medicine-Washington University Medical Center
Fellowship Gastroenterology-Truman Medical Center, Kansas City, MO
Board Certification American Board of Internal Medicine and Gastroenterology
Additional Language(s) Spanish, Chinese

Dr. Tsen is a digestive disease professional who specializes in colonoscopy, endoscopic procedures, chronic heartburn and reflux, abdominal pain, anemia, viral hepatitis and chronic diarrhea and constipation.

General Surgery

Dwyer, Michael MD

Address 1255 Ashby St.
Seguin, TX 78155
Phone (830) 372-2840
Medical School University of Oklahoma
Internship University of Vermont
Residency Surgery-US Army Fort Sam Houston
Board Certification American Board of General Surgery
Additional Language(s) Spanish, Montagnard

Dr. Dwyer has been a GRMC physician since 1982. Prior to joining the GRMC medical staff, Dr. Dwyer served in the US Army where he was a Vietnam surgeon and received a bronze star for his admirable services.

Hambric, Bryan MD

Address 1346 E. Walnut St.
Seguin, TX 78155
Phone (830) 379-4500
Medical School Baylor College of Medicine
Residency University of Texas at Southwestern
Board Certification American Board of General Surgery
Additional Language(s) Spanish

A Fellow of the American College of Surgeons, Dr. Hambric has collaborated on multiple award-winning publications and is a member of the Alpha Omega Alpha Medical Honor Society. His extensive medical training gives him the ability to provide the highest level of specialized care for GRMC patients.

Kneuper, Mark MD, FACP

 

Address 652 N. Houston #3
 New Braunfels, TX 78130
Phone (830) 386-0088
Medical School University of Texas Medical Branch at Galveston
Internship University of Oklahoma Medical College- Tulsa, OK
Residency Health Cleveland-Cleveland, OH
Board Certification American Board of Surgery
Additional Language(s) Spanish, German

A GRMC physician since 1994, Dr. Kneuper is a Fellow of the American College of Surgeons and Diplomat of the American Board of Surgery. He has been in private practice since 1992. Dr. Kneuper utilizes the best technology to help set a very high standard for patient care excellence.

Vela, Serapio MD

Address 515 N. King, Suite 105
Seguin, TX 78155
Phone (830) 372-4891
Medical School University of Monterey
Internship Mount Sinai-Mansheth, NY
Residency General Surgery-Chicago, IL
Additional Language(s) Spanish

Dr. Vela is a staff physician at the Seguin Surgical Clinic and has provided expert clinical support at GRMC since 1988. His extensive experience ensures excellent outcomes for GRMC surgery patients.

Hospitalists

Gross, Gustavo MD

Address 1215 E. Court
Seguin, TX 78155
Phone (830) 379-2411
Medical School East Tennessee State University
Residency Duke University
Board Certification Family Medicine

Dr. Gustavo Gross brings an extensive background in Emergency Medicine, Family Practice and Hospitalist care to his role as hospitalist at GRMC. Dr. Gross also has expertise in identifying snake species from around the world and treating venomous bites.

Shah, Zulfiqar A. MD

 

Address

 

1215 E. Court St.
Seguin, TX 78155
  

Phone (830) 379-2411

Infectious Disease

Kaspar, T. Adam MD

Address 1064 E. Ireland
Seguin, TX 78155
Phone (830) 401-4455
Medical School UTMB at Galveston
Internship Internal Medicine-UTMB at Galveston
Residency Internal Medicine-UTMB at Galveston
Fellowship Infectious Disease-UTHSC , San Antonio, TX
Board Certification

American Board of Internal Medicine/ Infectious Diseases, American Board of HIV Medicine

Since 2001, he has also been involved in various clinical research studies, including new antibiotics directed against drug-resistant germs such as “MRSA.” Dr. Kaspar has demonstrated his knowledge as both a clinical investigator and public speaker for prescription antibiotics. Dr. Kaspar treats all types of infections as well as HIV and Hepatitis C.

Internal Medicine

Frets, Robert MD

Address 1255 Ashby Street, Suite I
Seguin, TX 78155
Phone (830) 372-1615
Medical School UTHSC, San Antonio, TX
Internship UTHSC –Houston
Residency Internal Medicine-UTHSC Affiliated Hospital, Houston, TX
Board Certification American Board of Internal Medicine
Additional Language(s) Spanish

Dr. Frets has been a GRMC outstanding physician since 1980. He is highly-qualified in internal medicine- allowing him to diagnose, manage and treat adult diseases.

Tamtam, Sankararao MD

Address

932 S. SH 123 Bypass 
Seguin, TX 78155

Phone (830) 379-3999
Medical School Andhra University, Kahinada, AP, India
Internship Wayne State University/Grace Hospital, Detroit, MI
Residency Wayne State University
Board Certification American Board of Internal Medicine
Additional Language(s) Hindi, Telugu, & Spanish-Staff Only

Dr. Tamtam has completed extensive research in areas of cardiovascular treatment, acute bacterial sinusitis, chronic bronchitis and central venous catheters. He has spoken on topics including Endocrinology/Diabetes and Risks & Indications for RBC (red blood cell) Transfusions. His knowledge in preventative medicine permits him to accurately help patients’ prevent and overcome health problems.

Kuo, Yu-Jie (Jack) MD

Address 1356 E. Walnut
Seguin, TX 78155
Phone (830) 372-5588
Medical School UT Southwestern at Dallas
Internship UTHSC, San Antonio, TX
Residency UTHSC, San Antonio, TX
Board Certification American Board of Internal Medicine

Dr. Kuo has been a GRMC physician since 1997. He is specially-trained to treat common, complex and chronic adult medical conditions.

Nephrology

Banks, Heather MD

 

Address 1064 E. Ireland
Seguin, TX 78155
Phone (830) 624-7530
Medical School UTSA Medical School
Internship Internal Medicine—UTHSC, San Antonio, TX
Residency Internal Medicine—UTHSC, San Antonio, TX
Fellowship Nephrology—UTHSC, San Antonio, TX
Board Certification

American Board of Internal Medicine

 

Mourad, Shadi MD

 

Address

 

128 S. Moss Street Suite 100
Seguin, TX 78155
  

Phone (830) 303-8770

Obstetrics/Gynecology

Colvin, James (Jim) MD

Address 519 N King Street, Suite 101
Seguin, TX 78155
Phone (830) 372-2791
Medical School UTMB-Galveston
Internship John Peter Smith Hospital
Residency John Peter Smith Hospital
Board Certification American Board of Obstetrics and Gynecology
Additional Language(s) Spanish

Dr. Jim Colvin has been a GRMC physician since 1979. He is a member of the American Congress of Obstetrics and Gynecologists, Guadalupe County Medical Society,Texas Medical Association and Alpha Omega Alpha Honor Medical Society.

Kirchner, Alyson MD

Address 1339 E. Court, Suite 210
Seguin, TX 78155
Phone (830) 379-1500
Medical School UTHSC, San Antonio, TX
Residency UTHSC, San Antonio, TX
Board Certification American Board of Obstetrics and Gynecology
Additional Language(s) Spanish

Dr. Alyson Kirchner was awarded Executive Chief Resident at UTHSC-SA in the OB/GYN Department. A Seguin native, Dr. Kirchner understands the importance of providing quality health care close to home. She specializes in women’s health care, bone density testing, 3D/4D ultrasound diagnostics and laparoscopic surgical procedures like laparoscopic hysterectomy and pelvic floor reconstruction.

Mannel, George MD

Address 1255 Ashby Street
Seguin, TX 78155
Phone (830) 372-0600
Medical School UTMB-Galveston
Internship St. Joseph-Houston
Residency St. Joseph-Houston
Board Certification American Board of Obstetrics and Gynecology
Additional Language(s) Spanish

A GRMC physician since 1984, Dr. Mannel specializes in women’s health care including 3D/4D ultrasound exam photos and video and bone density testing. He also performs several laparoscopic surgical procedures-helping patients receive the right care with less recovery time, costs, and pain compared to traditional open procedures.

Rath, E. Albert MD

Address 274 E. Garza St.
New Braunfels, TX 78130
Phone (830) 625-7714
Medical School UTMB-Galveston
Internship Wesley Medical Center-Wichita, KS
Residency UTMB-Galveston
Board Certification American Board of Obstetrics and Gynecology

Dr. Albert E. Rath brings extensive medical experience to GRMC. He is a member of the Texas Medical Association, Texas Association OB/GYNs, Cooke Club, Christian Medical Society and the Comal County Medical Society.

Remsing, Tiffany MD

 

Address 1339 E. Court, Suite 230
Seguin, TX 78155
Phone (830) 372-0800
Medical School UTHSC, Houston, TX
Residency UTHSC, San Antonio, TX
Board Certification American Board of Obstetrics and Gynecology
Additional Language(s) Spanish

Dr. Tiffany Remsing grew up farming and recognizes the importance of good medical care to rural communities. She enjoys discussing and educating patients about their health and the care they receive. Dr. Remsing specializes in women's health care utilizing up to date technologies, procedures, and therapies.

Rinn, Phillip MD

 

Address 519 N. King, Suite 105
Seguin, TX 78155
Phone (830) 372-0994
Specialty Family Practice
Medical School UTHSC, San Antonio, TX
Internship Family Practice-John Peter Smith Hospital
Residency Family Practice-John Peter Smith Hospital
Board Certification American Board of Family Medicine

Dr. Phillip Rinn is Chairman of the Guadalupe Healthcare Network and has practiced medicine at GRMC since 1984. With extensive experience in Family Medicine and Obstetrics, Dr. Rinn delivers efficient care to each patient. 

Oncology/Hematology

Dabas, Basel MD

 

Address

 

515 N. King St.
Seguin, TX 78155
  

Phone (830) 372-4270

Daggubati, Sreedevi MD

Address 1348 E. Walnut, Unit 1348
Seguin, TX 78155
1448 E. Common St.
New Braunfels, TX 78130
Phone (830) 379-8688
Medical School Guntur Medical College, University of Health Science, AP, India
Internship Guntur Medical College, University of Health Science, AP, India
Residency Wyckoff Heights Medical Center at Cornell University, Brooklyn, NY
Fellowship Hematoloy/Oncology-Albert Einstein College of Medicine at Montefiore Medical Center, Bronx, NY
Board Certification American Board of Internal Medicine/Medical Oncology and Hematology
Additional Language(s) English, Telugu

http://cancercaresouthtexas.com

Dr. Daggubati’s special interests include breast and gastrointestinal malignancies and clinical trials. She has published in the Journal of the European Society of Cardiology, and presented at the American College of Gastroenterology meeting and the 79th Annual Meetings of the Endocrine Society. Dr. Daggubati scored in the Top 10 percentile upon taking her American Board of Internal Medicine board exams.

Orthopedics

Deetjen, Jack MD

Address 515 N King St., Suite 106
Seguin, TX 78155
Phone (830) 379-8371
Medical School Baylor College of Medicine-Houston, Texas
Internship General Surgery-Wright-Patterson USAF Medical Center
Residency Orthopaedic Surgery-Wilford Hall, USAF Medical Center
Board Certification American Board of Orthopaedic Surgery

http://orthodoc.aaos.org/DrJackDeetjen

As a Fellow of the American Academy of Othopaedic Surgeons and former Major in the US Air Force, Dr. Deetjen has received various awards and achievements for his excellent service to patients. Recently, Dr. Deetjen was named a Top Doctor and Best Physician as chosen by peers in San Antonio Magazine. He is also a member of the International Medical Assistance Board of Directors, Seguin Pregnancy Center Board of Directors and has been involved with several short term medical missions to Mexico.

Sahni, Irvin MD

Address 1339 E. Court, Suite 240
Seguin, TX 78155
Phone (830) 379-8800
Medical School Baylor College of Medicine-Houston, TX
Internship General Surgery-Baylor College of Medicine
Residency Orthopedic Surgery-Baylor College of Medicine
Fellowship Spine Surgery-Baylor College of Medicine
Board Certification American Board of Orthopaedic Surgery
Additional Language(s) Spanish

A Native Texan, Dr. Sahni has developed a reputation as a skilled and knowledgeable spinal surgeon by utilizing the latest advancements in spinal surgery techniques. Minimally invasive state-of-the-art spinal surgery techniques allow for low complication rates for GRMC patients.

Twitero, Trent MD

Address 280 S. King
Seguin, TX 78155
Phone (830) 379-9492
College University of North Dakota
Medical School Uniformed Services University of Health Sciences, Bethesda, MD
Internship Brooke Army Medical Center, San Antonio, TX
Residency Lone Star Family Medicine Residency, Conroe, TX
Board Certification American Board of Orthopaedic Surgery

Dr. Twitero has served in the positions of Chief of Surgery and Department Chief of Orthopedics and Rehabilitation Services in military hospitals. A former Lieutenant Colonel in the U.S. Army, Dr. Twitero has received many military honors, including a Bronze Star for his efforts in Iraq and special commendations for excellent patient care.

White, G. Steven MD

Address 280 S King
Seguin, TX 78155
Phone (830) 379-9492
Medical School Louisiana State School of Medicine
Internship Orthopedics-UTHSC, San Antonio, TX
Residency Orthopedics-UTHSC, San Antonio, TX
Board Certification American Board of Orthopaedic Surgery
Additional Language(s) Spanish

As Chief Medical Officer (CMO) at GRMC, Dr. Steven White makes it a high priority to serve the needs of GRMC patients and medical staff. He has practiced at GRMC since 1984. Dr. White is also active with many professional associations such as the American Academy of Orthopaedic Surgeons, Texas Medical Association, Texas Orthopedic Association and the Guadalupe County Medical Society.

Pain Management

Dar, Urfan MD

Address 1350 Ashby Street
 Seguin, TX 78155
Phone (210) 268-0129
 

www.sapaindoc.com • www.tricitypaindoc.com

 

Pathology

Grieder, Kevin DO

Address 1255 Ashby, Suite B
Seguin, TX 78155
Phone (830) 372-4830
Medical School University of North Texas Health Science Center
Internship Hurst General Hospital
Residency Anatomic and Clinical Pathology, University of California, Long Beach and Scott & White Hospital, Temple, TX
Board Certification American Board of Pathology, Anatomical Pathology and Clinical Pathology

Dr. Grieder has been a GRMC physician and Director of Seguin Pathology Services since 1986. He is a fellow of the College of American Pathologists and a member of the Texas Medical Association, Guadalupe Medical Society and American Medical Association.

Pediatrics

Carreon, Ivonne MD

Address 1500 E. Court, Suite 300
Seguin, TX 78155
Phone (830) 379-7334
Medical School Escuela de Medicina Ignacio A. Santos, Monterrey, Mexico
Internship Baylor College of Medicine
Residency Baylor College of Medicine
Board Certification American Board of Pediatrics
Additional Language(s) Spanish

http://www.rivervalleypeds.com

Dr. Carreon has served as the President of River Valley Pediatrics since 2003. She is Medical Director of Wings for Life, a residential program that offers housing for local at-risk teen moms and is the author of Kids Living Large, a book about childhood obesity.

Fisher, James MD

Address 1500 E. Court, Suite 300
Seguin, TX 78155
Phone (830) 379-5200
Medical School UT Medical Branch – Galveston
Internship UTHSC, San Antonio, TX
Residency UTHSC, San Antonio, TX
Board Certification American Board of Pediatrics

http://www.rivervalleypeds.com

A long time resident of Seguin, Dr. Fisher is a skilled-physician dedicated to the special concerns of each child’s medical needs.

Lopez-Glynn, Michele MD

Address 1005 E. Court, Suite 300
Seguin, TX 78155
Phone (830) 303-3400
Medical School UT Health Science Center – Houston
Internship Scott & White Memorial Hospital, Temple, TX
Residency Scott & White Memorial Hospital, Temple, TX
Additional Language(s) Spanish

www.missionpediatrics.com

Dr. Lopez-Glynn is the operator of Mission Pediatrics and prides herself in caring for patients from infancy through 17 years of growth and development. Her extensive medical training allows for specialized child care.

Stephens, Robert MD, F.A.A.P

Address 520 E. Donegan
Seguin, TX 78155
Phone (830) 379-6300
Medical School University of Rochester School of Medicine and Dentistry, New York
Internship Rainbow Babies and Children’s Hospital, University Hospital Cleveland
Residency Rainbow Babies and Children’s Hospital, University Hospital Cleveland
Board Certification American Board of Pediatrics

http://www.cstonepeds.com

Dr. Stephens has cared for pediatric patients since 1996. He prides himself with special interests of wellness promotion for children and families, asthma care, attention deficit/hyperactivity disorder, and children with special health care needs.

Physiatry

Zhang, Xin MD

Address Seguin, TX 78155
Phone (830) 608-9300
Medical School Shanghai Medical University
Internship University of Kentucky Medical Center
Residency University of Kentucky Medical Center
Additional Language(s) Spanish

Dr. Xin Zhang is the Medical Director of the Inpatient Rehabilitation Unit at GRMC. She provides comprehensive rehabilitation for short-term and intensive therapy needs, orthopedic, neurologic and debilitative patient care.

Psychiatry

Castro, Rebecca MD

Address 1331 E. Court, Suite 106
Seguin, TX 78155
Phone (830) 401-7367
Medical School University Texas Health Science Center-San Antonio, TX
Internship University Texas Health Science Center-San Antonio, TX
Residency Psychiatry-San Antonio, TX
Board Certification American Board of Psychiatry
Additional Language(s) Spanish

Dr. Castro is the Medical Director of the Teddy Buerger Center (TBC), the only licensed treatment center in Guadalupe county, and the Heritage Program. She has provided outpatient chemical dependency and mental health services at GRMC since 1992.

Pulmonology

Hong, Joseph MD

Address 519 N. King, Suite 106
Seguin, TX 78155
Phone (830) 433-9340
Specialty Pulmonology/Critical Care/Sleep
Medical School University of Texas Medical Branch in Galveston
Internship Internal Medicine-Beth Israel Medical Center, New York
Residency Internal Medicine-Beth Israel Medical Center, New York
Fellowship Pulmonology/Critical Care/Sleep Medicine-Scott and White Memorial Hospital/Texas A&M UHSC
Board Certification American Board of Internal Medicine/ Pulmonary Disease, Critical Care Medicine & Sleep Medicine

Dr. Hong is a member of the American College of Chest Physicians and the Society of Critical Care Medicine. Joining the GRMC medical staff in 2007, Dr. Hong’s local availability allows our community to be treated for both pulmonary and sleep disorders without having to travel out of town.

Radiation Oncology

Lawson, Richard MD

Address 1304 Wonder World Drive
San Marcos, TX 78666
2020 Sundance Parkway, Suite A1
New Braunfels, TX 78130
Phone (512) 396-2500
(830) 629-4200
Medical School University of Texas Health Science Center–San Antonio
Internship Emory University, Atlanta, GA
Residency Emory University, Atlanta, GA
Board Certification American Board of Radiology-Radiation Oncology

http://thecentersforcancercare.com

Dr. Lawson’s special interests include intensity modulated radiation therapy (IMRT), LINAC-based radiosurgery, head and neck cancer, PET/CT treatment planning, and brachtherapy. Dr. Lawson is a member of the American Society of Therapeutic Radiation Oncology, American College of Radiology and the American Society of Clinical Oncology.

Radiology

Bowman, Steven MD

 

Address 1215 E. Court
Seguin, TX 78155
Phone (830) 379-2411
Medical School UTHSC, San Antonio, TX
Internship University Hospital/Internal Medicine
Residency University Hospital/Diagnostic Radiology
Board Certification American Board of Radiology/Diagnostic Radiology
Honors Alpha Omega Alpha Medical Honor Society

 

Cody, Thomas MD

Address 1215 E. Court
Seguin, TX 78155
Phone (830) 379-0791
Medical School UTHSC, San Antonio, TX
Internship Surgery- UTHSC, San Antonio, TX
Residency Radiology- UTHSC, San Antonio, TX
Board Certification American Board of Radiology/Diagnostic Radiology
Additional Language(s) Spanish

Dr. Thomas Cody has held several professional positions of academia in radiology as Clinical Professor, Associate Head Professor and Assistant Professor of Radiology at UTHSC-SA.

Urology

Ryan, Robert MD

Address 1339 E. Court, Suite 230
Seguin, TX 78155
Phone (830) 379-8491
Medical School UTHSC,San Antonio, TX
Internship General Surgery-UTHSC, San Antonio, TX
Residency Urology-UTHSC, San Antonio, TX
Board Certification American Board of Urology

Dr. Robert Ryan is the current Chief of Staff at GRMC and has cared for patients in our region since 2004. After 7 years with Seguin Urology, he recently opened his solo practice, Guadalupe Urology. He has received many honors including The Society of Laparoendoscopic Surgeons Resident Achievement Award, Alpha Omega Alpha Honor Medical Society and the Pfizer Scholars in Urology.

Solomon, Howard MD

Address 1255 Ashby
Seguin, TX 78155
Phone (830) 379-3046
Medical School University of Vermont
Internship Tripler Army Medical Center, Honolulu, Hawaii
Residency Brooks Army Medical Center, San Antonio, TX
Board Certification American Board of Urology

Dr. Solomon is a retired Colonel in the US Army. His extensive medical training allows him to provide the highest level health care to GRMC patients.

Vascular Surgery

Rossbach, Mario MD

Address

515 E. Court, Suite 300
Seguin, TX 78155

1626 E. Common
New Braunfels, TX 78130

Phone (830) 401-4880 (Seguin)
(830) 620-1191 (New Braunfels)
Medical School Francisco Marroquin Univ.—Guatemala City, Guatemala
Internship Surgery—UTHSC, San Antonio, TX
Residency Surgery—UTHSC, San Antonio, TX
Fellowship Surgery—UTHSC, San Antonio, TX
Additional Language(s) German and Spanish
Board Certification American Board of Surgery

Wound Care & Hyperbaric Medicine

Dietz, Duane MD

Address 1215 E Court
Seguin, TX 78155
Phone (830) 401-7777
Medical School University of Texas Medical School at Houston
Internship Montgomery Co. Medical Education Foundation-Conroe, TX
Residency Montgomery Co. Medical Education Foundation-Conroe, TX
Board Certification American Board of Preventative Medicine/Undersea and Hyperbaric Medicine
Additional Language(s) Spanish

Dr. Dietz has practiced Hyperbaric Medicine and Wound Care since 1997. He began helping patients in GRMC's Wound and Hyperbaric Medicine Center in December 2004. Prior, Dr. Dietz practiced locally as an ER physician and trained in hyperbaric and wound care medicine. GRMC is fortunate to have Dr. Dietz on board as a full-time medical practitioner, helping patients improve their quality of health.

Quebedeaux, Terri DPM

Address 711 E Court
Seguin, TX 78155
Phone (830) 401-7777
Specialty Podiatry
Medical School University of Osteopathic Med. & Health Sciences, Des Moines, IA
Internship UTHSC,San Antonio, TX
Residency UTHSC,San Antonio, TX
Additional Language(s)  Spanish

Dr. Terri Quebedeaux, trained in Podiatry and Wound Care, has specialized in treating lower extremity wounds at GRMC since 1999. Dr. Quebedeaux began GRMC's Wound & Hyperbaric Medicine Center in December 2004. She helps patients to identify undiagnosed diseases that may have affected their healing process. Dr. Quebedeaux’s extensive medical knowledge and service can help GRMC patients learn to make positive changes in their lives.