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

Emergency Medicine in San Marcos, Texas

Data updated monthly · Last refresh September 2026

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

Emergency 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. Bradley Lawing
San Marcos, TX · No drug or device payments recorded (2025) · (512) 753-3516
Dr. Curtis Grote, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 753-3796
Dr. Daniel Loisel, DO
San Marcos, TX · No drug or device payments recorded (2025) · (512) 753-3796
Dr. Grant Williams, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 753-3796
Dr. Jessica Best, MD
San Marcos, TX · $138 in drug and device payments (2025) · (720) 350-2323
Dr. John Whisenant, MD
San Marcos, TX · $145 in drug and device payments (2025) · (512) 753-3796
Dr. Jose Pena, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 753-3796
Dr. Katherine Sides, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 353-8979
Dr. Myla Canales, M.D.
San Marcos, TX · No drug or device payments recorded (2025) · (512) 353-8979
Dr. Randolph Seybold, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 753-3796
Dr. Toan Leung, MD
San Marcos, TX · No drug or device payments recorded (2025) · (512) 753-3796

Common questions

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

There are 11 Emergency Medicine providers with active NPI records practicing in San Marcos, according to federal NPPES data refreshed monthly.

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 Emergency 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.