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Internal Medicine - Gastroenterology Specialists in Houston, TX

Browse 277 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in Houston, Texas.

277 Healthcare Providers

How Houston compares with the U.S.

Houston has 12 clinicians in Internal Medicine - Gastroenterology per 100,000 residents, about 1.9 times the U.S. rate of 6.2.

That is 277 active clinicians in Internal Medicine - Gastroenterology with a practice address in Houston, for a population of 2,328,253.

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.

95% of clinicians in Internal Medicine - Gastroenterology in Houston listed in the CMS Medicare file (212 of 224) 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.

50% of clinicians in Internal Medicine - Gastroenterology in Houston listed in the CMS Medicare file (111 of 224) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than 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 Houston, TX

Source: CMS PECOS
PECOS Enrolled Specialists 240 In Houston, TX
Part B Lab & Imaging Eligible 241 Diagnostic Referrals
DME Ordering Eligible 243 Durable Medical Equipment
Home Health Agency Referrals 241 HHA Ordering Eligible
Showing 1โ€“20 of 277 providers
With recent CMS data first, then Aโ€“Z

Ali Aamar

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
18123 Upper Bay Rd Ste 400, Houston, TX 770583875
Phone: 2815233320
NPI Identifier 1922419209
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Dr. Wasif M Abidi , MD, PhD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
7200 Cambridge St, Suite 10c, Houston, TX 770304202
Phone: 7137980950
NPI Identifier 1821230780
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Dr. Bincy Paulose Abraham , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
6550 Fannin St, Suite 1201, Houston, TX 770302717
Phone: 7134413372
NPI Identifier 1578767166
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Dr. Farid Abushamat , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
929 Gessner Rd Ste 1360, Houston, TX 770242469
Phone: 7134682030
NPI Identifier 1629574975
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Dr. Naga Saranya Addepally , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
13644 Breton Ridge St Ste B, Houston, TX 770706087
Phone: 7134971143
NPI Identifier 1275949265
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Dr. Suneal Kumar Agarwal , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
7200 Cambridge St, Suite 10c, Houston, TX 770304202
Phone: 7137980950
NPI Identifier 1720242324
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Dr. Mazen Al-Asadi , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1515 Holcombe Blvd, Houston, TX 770304000
Phone: 7137926161
NPI Identifier 1598782682
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Dr. Ihsan Al Bayati , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
18300 Katy Fwy Ste 425, Houston, TX 770941536
Phone: 8325228560
NPI Identifier 1538571849
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Dr. Shahid Ali , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
444 Fm 1959 Rd, Houston, TX 770345416
Phone: 2814819400
NPI Identifier 1881604460
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Dr. Mouhamad Radwan Al-Sabbagh , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1140 Business Center Dr Ste 380, Houston, TX 770432742
Phone: 7134671750
NPI Identifier 1740260900
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Dr. Brick Eduardo Alva , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
11738 Fm 1960 Rd W, Houston, TX 770653514
Phone: 7134941805
NPI Identifier 1720025380
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Dr. Harshinie Chamindika Amaratunge , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
4100 S Shepherd Dr, Houston, TX 770985316
Phone: 7137954444
NPI Identifier 1265696504
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Dr. Darshan P Anandu , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1140 Westmont Dr Ste 350, Houston, TX 770154368
Phone: 7134503333
NPI Identifier 1487657680
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Dr. Victor Ankoma-Sey , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
6560 Fannin St Ste 1980, Houston, TX 770302710
Phone: 7137998300
NPI Identifier 1144226515
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Dr. Zaid Azhar Ansari , MD

Internal Medicine - Gastroenterology

Active NPI Status
6431 Fannin St, Houston, TX 770301501
Phone: 7135006677
NPI Identifier 1811551641
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Dr. Azubuogu Charles Anudu , MD

Internal Medicine - Gastroenterology

Active NPI Status
7200 Cambridge St, Houston, TX 770304202
Phone: 8139742201
NPI Identifier 1699238014
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Dr. Mustafa Atiq Arain , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
6400 Fannin St Fl 14, Houston, TX 770301521
Phone: 7135003450
NPI Identifier 1669420618
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Dr. Pedro Miguel Arguello , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
9190 Old Katy Rd, Suite 102, Houston, TX 770557432
Phone: 7136479300
NPI Identifier 1508876939
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Dr. Meera Avila , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
444 Fm 1959 Rd Ste A, Houston, TX 770345416
Phone: 2814819400
NPI Identifier 1740608348
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Dr. Fares Walid Ayoub , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
7200 Cambridge St Ste 8b, Houston, TX 770304202
Phone: 7137980950
NPI Identifier 1679936868
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Frequently Asked Questions about Internal Medicine - Gastroenterology in Houston

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.