Physicians

The 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.

Need a Physician?
Physician Referral — 830-303-4846

Anesthesiology

Daniel Campos, MD

Board Certified in Anesthesiology

Anesthesia Association of Seguin
1215 E Court
Seguin, 78155
(830) 379-5867

Language(s) Spoken:Spanish

Dolores S. Major, MD

Board Certified in Anesthesiology

Anesthesia Association of Seguin
1215 E Court
Seguin, 78155
(830) 379-5867

Ronald E. Mayhorn, MD

Board Certified in Anesthesiology

Anesthesia Association of Seguin
1215 E Court
Seguin, 78155
(830) 379-5867

Daniel N. Piña, MD

Board Certified in Anesthesiology

Anesthesia Association of Seguin
1215 E Court
Seguin, 78155
(830) 379-5867

Language(s) Spoken:Spanish

Bariatric Surgeon

Steven W. Fath, MD

Board Certified in General Surgery
Specialized Training in Advanced Minimally Invasive and Bariatric Surgery

Guadalupe Valley Surgical Associates
1346 E Walnut
Seguin, 78130
(830) 303-8600

Peter A. Garza, Jr., MD

Specialized Training in Advanced Minimally Invasive and Bariatric Surgery

1619 E Common St
New Braunfels, 78130
(830) 624-8230

Cardiology

Stephen M. Sokolyk, MD

Board Certified in Internal Medicine

Heart & Vascular Institute of Texas
908 E Court
Seguin, 78155
(830) 303-9221

Language(s) Spoken:Spanish, German, Ukranian

Ear, Nose & Throat

Jennifer Hennessee, MD

Board Certified in Ear, Nose and Throat

1339 E Court
Seguin, 78155
(830) 379-0299

Brooks M. Mullen, MD

Board Certified in Otolaryngology, Head and Neck Surgery

Seguin Ear, Nose and Throat
908 E Court, Suites 2 & 4
Seguin, 78155
(830) 372-0307

Language(s) Spoken:Spanish

Emergency Medicine

Michael Rotts, MD

Guadalupe Regional Emergency Physicians
1215 E Court
Seguin, 78155
(830) 379-2411

Family Practice

Susan L. Boullioun, MD

Board Certified in Family Practice

113 E Cedar
Seguin, 78155
(830) 303-3500

Melanie Carreon, MD

Board Certified in Family Practice

1352 E Walnut
Seguin, 78155
(830) 379-9266 or (830) 379-9267

Language(s) Spoken:Spanish

Jerry F. Castilleja, MD

Board Certified in Family Practice

1354 E Walnut
Seguin, 78155
(830) 401-0025

Language(s) Spoken:Spanish

Antonio A. Flores, MD

Board Certified in Family Practice
Specialty: Geriatrics

1339 E Court
Seguin, 78155
(830) 379-8811

Arlynn H. Hartfiel, MD

Board Certified in Family Practice

519 N King, Suite 103
Seguin, 78155
(830) 372-1980

James C. Lee, MD

Board Certified in Family Practice

519 N King, Suite 102
Seguin, 78155
(830) 379-7901

Thomas H. Raetzsch, MD

Board Certified in Family Practice

1025 N Austin
Seguin, 78155
(830) 379-1184

Language(s) Spoken:Spanish

Phillip C. Rinn, MD

Board Certified in Family Practice

519 N King, Suite 107
Seguin, 78155
(830) 372-0994

(also practices Obstetrics)

Nicole Talbot, DO

Board Certified in Family Practice

Seguin Family Medicine
1339 E. Court St., Suite 210
Seguin, 78155
(830) 372-5200

Dean L. Zincone, MD

1355 E Court
Seguin, 78155
(830) 401-4401

Language(s) Spoken:Spanish

Gastroenterology

Tony Tsen, MD

Board Certified in Internal Medicine and Gastroenterology

Southwest Gastroenterology
219 S Leonard
Seguin, 78155
(830) 372-9042

General Surgery

Michael J. Dwyer, MD

Board Certified in General Surgery

Guadalupe Regional Surgical Associates
1255 Ashby
Seguin, 78155
(830) 372-2840

Language(s) Spoken:Spanish

Mark Kneuper, MD, FACP

Board Certified in General Surgery
Fellow of the American College of Surgeons
Diplomate of the American Board of Surgery

1350 Ashby, Suite A
Seguin, 78155
(830) 386-0088

Serapio Vela, MD

Seguin Surgical Clinic
515 N King, Suite 105
Seguin, 78155
(830) 372-4891

Language(s) Spoken:Spanish

Infectious Disease

T. Adam Kaspar, MD

Board Certified in Infectious Disease and Internal Medicine

1344 E Walnut
Seguin, 78155
(830) 401-4455

Internal Medicine

Robert L. Frets, MD

Board Certified in Internal Medicine

1255 Ashby, Suite L
Seguin, 78155
(830) 372-1615

Yu-Jie (Jack) Kuo, MD

Board Certified in Internal Medicine

1356 E Walnut
Seguin, 78155
(830) 372-5588

Sankararao Tamtam, MD

Board Certified in Internal Medicine

205 N King
Seguin, 78155
(830) 379-3999

Language(s) Spoken:Hindi, Telug

Internal Medicine/Hospitalist

Homar Bartra, MD

Board Certified in Internal Medicine

1215 E Court
Seguin, 78155
(830) 379-2411

Guido J Calderon, MD

Board Certified in Internal Medicine

1215 E Court
Seguin, 78155
(830) 379-2411

Martin Levett, MD

Board Certified in Internal Medicine

1215 E Court
Seguin, 78155
(830) 379-2411

Steve Slagle, MD

Board Certified in Internal Medicine

1215 E Court
Seguin, 78155
(830) 379-2411

Neurology

Michelle Moon, DO

1339 E Court Suite 230
Seguin, 78155
(830) 379-4422

Praveen K Thangada, MD

Guadalupe Regional Neurology
634 E Court
Seguin, 78155
(830) 303-1819

Obstetrics/Gynecology

Aysun Alagoz, MD

Serenity OB/GYN
1109 N Austin St
Seguin, 78155
(830) 386-0000

James (Jim) T. Colvin, MD

Board Certified in Obstetrics and Gynecology

519 N King, Suite 101
Seguin, 78155
(830) 372-2791

Language(s) Spoken:Spanish

George S. Mannel, MD

Board Certified in Obstetrics and Gynecology

Guadalupe Regional Women's Healthcare Center
1255 Ashby
Seguin, TX 78155
(830) 372-0600

Language(s) Spoken:Spanish

Oncology Radiation

David C. Jones, MD

Board Certified in Radiation Oncology

Central Texas Center for Cancer Care
1304 Wonder World Dr
San Marcos, 78666
(512) 396-2500

Language(s) Spoken:Spanish (limited)

Richard S. Lawson, MD

Board Certified in Radiation Oncology

Central Texas Center for Cancer Care
1304 Wonder World Dr
San Marcos, 78666
(512) 396-2500

Language(s) Spoken:Spanish (limited)

Oncology/Hematology

Deven Bhachawat, MD

Board Certified in Internal Medicine

Lone Star Cancer and Blood Disorder
515 N. King #104
Seguin, 78155
(830) 303-1121

Sreedevi Daggubati, MD

Board Certified in Medical Oncology, Hematology, and in Internal Medicine

1448 E. Common St.
New Braunfels, 78130
(830) 643-1762 Fax: (830) 609-7702

Albert Wood, MD

Board Certified in Internal Medicine and Medical Oncology

515 N. King St., Suite 103
Seguin, 78155
(830) 372-4270

Orthopedics

Jack L. Deetjen, MD

Board Certified in Orthopedic Surgery

515 N King, Suite 106
Seguin, 78155
(830) 379-8371

Irvin Sahni, MD

Board Certified in Orthopedic Surgery
Specialty: Spine

1339 E Court, Suite 300
Seguin, 78155
(830) 379-8800

G. Steven White, MD

Board Certified in Orthopedic Surgery

280 S. King
Seguin, 78155
(830) 379-9492

Pathology

Kevin T. Grieder, DO

Board Certified in Anatomic and Clinical Pathology

Seguin Pathology Services
1255 Ashby, Suite B
Seguin, 78155
(830) 372-4830

Pediatrics

Ivonne Carreon, MD

Board Certified in Pediatrics

River Valley Pediatrics
1005 E Court, Suite 300
Seguin, 78155
(830) 379-7334

Language(s) Spoken:Spanish

James Fisher, MD

River Valley Pediatrics
1005 E Court, Suite 300
Seguin, 78155
(830) 379-7334

Michele Lopez-Glynn, MD

Mission Pediatrics
1005 E Court, Suite 300
Seguin, 78155
(830) 303-3400

Language(s) Spoken:Spanish

Physiatry (Physical Medicine)

Xin Zhang, MD

1215 E Court
Seguin, 78155
(830) 379-2411

Podiatry

Elizabeth R. Eline, MD

Board Certified in Podiatric Orthopedics

1064 E Ireland
Seguin, 78155
(830) 372-3668

Language(s) Spoken:Spanish

Bryan T. Patterson, DPM

1345 E College St
Seguin, 78155
(830) 372-0190

Language(s) Spoken:Spanish

Psychiatry (Geriatric)

Rebecca Castro, MD

Board Certified in Psychiatry

Teddy Buerger Center
1331 E Court
Seguin, 78155
(830) 401-7367

Language(s) Spoken:Spanish

Pulmonology

Joseph Hong, MD

Board Certified in Pulmonary Disease
Board Certified in Internal Medicine
Board Certified in Critical Care Medicine
Board Certified in Sleep Medicine

1350 E Walnut
Seguin, 78155
(830) 433-9340

Radiology

Jennifer A. Harper, MD

Board Certified in Diagnostic Radiology

Guadalupe Regional Radiology
1215 E Court
Seguin, 78155
(830) 379-0791

Barbara J. Spezia, MD

Board Certified in Radiology

Guadalupe Regional Radiology
1215 E Court
Seguin, 78155
(830) 379-0791

Urology

Robert T. Ryan, MD

Board Eligible in Urology

1255 Ashby
Seguin, 78155
(830) 379-3046

Howard D. Solomon, MD

Board Certified in Urology

1255 Ashby
Seguin, 78155
(830) 379-3046

Wound Care

Duane Dietz, MD

Guadalupe Regional Medical Center
219 Leonard Lane
Seguin, 78155
(830) 303-0005

Terri L. Quebedeaux, DPM

219 Leonard Lane
Seguin, 78155
(830) 303-0005

Language(s) Spoken:Spanish