HealthcareDiscovery.AI / Doctors / Texas / San Marcos / Internal Medicine

Internal Medicine in San Marcos, Texas

Data updated monthly · Last refresh September 2026

13 Internal Medicine providers practice in San Marcos. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in San Marcos

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Carlos Zamora, M.D.
San Marcos, TX · No drug or device payments recorded (2025) · (512) 396-6513
Dr. Cody Nichols, M.D.
San Marcos, TX · $71 in drug and device payments (2025) · (512) 396-1000
Dr. Donna Dolan, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 396-1525
Dr. Emilio Carranco, M.D.
San Marcos, TX · No drug or device payments recorded (2025) · (512) 245-2161
Dr. Grayson Smith, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 396-1525
Dr. Gregory Moore, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 396-1000
Dr. Janet Strickland, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 396-3911
Dr. Jose Ayala, MD
San Marcos, TX · $171 in drug and device payments (2025) · (512) 353-8979
Dr. Larry Beville, NP
San Marcos, TX · No drug or device payments recorded (2025) · (512) 396-1000
Dr. Margaret Whisenant, M.D.
San Marcos, TX · No drug or device payments recorded (2025) · (512) 245-2161
Dr. Raka Amin, MD
San Marcos, TX · $32 in drug and device payments (2025) · (214) 886-1789
Dr. Rubin Harris, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 342-0455
Dr. Thomas Parker, M.D.
San Marcos, TX · $188 in drug and device payments (2025) · (512) 353-8979

Conditions Internal Medicine providers in San Marcos, Texas commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Internal Medicine providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Internal Medicine providers are in San Marcos, Texas?

There are 13 Internal Medicine providers with active NPI records practicing in San Marcos, according to federal NPPES data refreshed monthly.

What conditions do Internal Medicine providers in San Marcos treat?

Internal Medicine providers in San Marcos commonly treat high blood pressure, type 2 diabetes, high cholesterol, preventive care, chronic disease management and related conditions. Individual practices vary, so confirm with the provider before booking.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in San Marcos Internal Medicine across Texas

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.