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Internal Medicine - Gastroenterology Specialists in San Antonio, TX

Browse 119 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in San Antonio, Texas.

119 Healthcare Providers

How San Antonio compares with the U.S.

San Antonio has 8.0 clinicians in Internal Medicine - Gastroenterology per 100,000 residents, about 1.3 times the U.S. rate of 6.2.

That is 119 active clinicians in Internal Medicine - Gastroenterology with a practice address in San Antonio, for a population of 1,479,835.

The Texas rate is 4.9 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

98% of clinicians in Internal Medicine - Gastroenterology in San Antonio listed in the CMS Medicare file (82 of 84) accept Medicare assignment. That is similar to the Texas share of 98%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

40% of clinicians in Internal Medicine - Gastroenterology in San Antonio listed in the CMS Medicare file (34 of 84) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is similar to the Texas share of 40%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine - Gastroenterology Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine - Gastroenterology practitioners in San Antonio, TX

Source: CMS PECOS
PECOS Enrolled Specialists 100 In San Antonio, TX
Part B Lab & Imaging Eligible 99 Diagnostic Referrals
DME Ordering Eligible 101 Durable Medical Equipment
Home Health Agency Referrals 99 HHA Ordering Eligible
Showing 1โ€“20 of 119 providers
With recent CMS data first, then Aโ€“Z

Dr. Muhammad Ali , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
11212 State Highway 151 Ste 250, Medical Plaza 1, San Antonio, TX 782514507
Phone: 2106141234
NPI Identifier 1427248608
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Dr. Hector D. Allende , MD

Internal Medicine - Gastroenterology

Active NPI Status
621 Camden Street, San Antonio, TX 782151639
Phone: 2102533422
NPI Identifier 1235237595
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Dr. John Jacob Alvarez , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
520 E Euclid Ave, San Antonio, TX 78212
Phone: 2102710606
NPI Identifier 1255692083
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Dr. Layth Haitham Alzubaidy , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
8435 Wurzbach Rd, San Antonio, TX 782293921
Phone: 2104509800
NPI Identifier 1144883380
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Balaji Kodandaraman Ayyar

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
855 Proton Rd, San Antonio, TX 782584203
Phone: 2106141234
NPI Identifier 1437595204
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Dr. Hopethe Hope Baker , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
903 W Martin St, San Antonio, TX 782070903
Phone: 2103589887
NPI Identifier 1174793483
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Dr. Boris R Blechacz , MD

Internal Medicine - Gastroenterology

Active NPI Status
4502 Medical Dr, San Antonio, TX 782294402
Phone: 2103584000
NPI Identifier 1174718308
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Dr. Ravi Botla , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
621 Camden Street, Suite 202, San Antonio, TX 782151639
Phone: 2102533422
NPI Identifier 1366540544
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Dr. Charles Elmer Brady , MD

Internal Medicine - Gastroenterology

Active NPI Status
8300 Floyd Curl Dr, 4rth Floor - 4a, San Antonio, TX 782293931
Phone: 2104509888
NPI Identifier 1255448221
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Dr. Brenda Marcela Briones , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
4502 Medical Dr, San Antonio, TX 782294402
Phone: 2103584000
NPI Identifier 1245693803
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Dr. Jeff Bullock , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
520 E Euclid Ave, San Antonio, TX 782124414
Phone: 2102710606
NPI Identifier 1528062288
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Dr. Jorge Miguel Cavazos , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
5223 Hamilton Wolfe Rd, San Antonio, TX 782294463
Phone: 2106141234
NPI Identifier 1184801359
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Dr. Prabhleen Chahal , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
8300 Floyd Curl Dr, San Antonio, TX 782293931
Phone: 2104509880
NPI Identifier 1841265527
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Abhishek Challa

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
11212 State Highway 151 Medical Plaza, 1, Suite 250, San Antonio, TX 782514507
Phone: 2106141234
NPI Identifier 1477968659
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Dr. Delbert Lee Chumley , MD

Internal Medicine - Gastroenterology

Active NPI Status
5223 Hamilton Wolfe Rd, San Antonio, TX 782294463
Phone: 2106141234
NPI Identifier 1740272962
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Dr. Seema A Dar , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
19284 Stone Oak Pkwy, Suite 102, San Antonio, TX 782583473
Phone: 2106563715
NPI Identifier 1548350598
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Dr. Kevin J. Dasher , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
621 Camden St Ste 202, San Antonio, TX 782151644
Phone: 2102533422
NPI Identifier 1386602712
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Dr. Souleymane Yaya Diallo , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4502 Medical Dr, San Antonio, TX 78229
Phone: 2103584000
NPI Identifier 1831534072
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Dr. Sunil K Dwivedi , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
5223 Hamilton Wolfe Rd, San Antonio, TX 782294463
Phone: 2106141234
NPI Identifier 1003854076
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Dr. Karolina Natalia Dziadkowiec , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
903 W Martin St # Ms 49-2, San Antonio, TX 782070903
Phone: 2013589887
NPI Identifier 1194229716
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Frequently Asked Questions about Internal Medicine - Gastroenterology in San Antonio

How do I check a Internal Medicine - Gastroenterology practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Texas licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.