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Internal Medicine - Gastroenterology Specialists in Mesa, AZ

Browse 39 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in Mesa, Arizona.

39 Healthcare Providers

How Mesa compares with the U.S.

Mesa has 7.6 clinicians in Internal Medicine - Gastroenterology per 100,000 residents, 23% higher than the U.S. rate of 6.2.

That is 39 active clinicians in Internal Medicine - Gastroenterology with a practice address in Mesa, for a population of 511,764.

The Arizona rate is 5.5 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.

90% of clinicians in Internal Medicine - Gastroenterology in Mesa listed in the CMS Medicare file (26 of 29) accept Medicare assignment. That is lower than the Arizona 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.

14% of clinicians in Internal Medicine - Gastroenterology in Mesa listed in the CMS Medicare file (4 of 29) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the Arizona share of 49%.

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 Mesa, AZ

Source: CMS PECOS
PECOS Enrolled Specialists 33 In Mesa, AZ
Part B Lab & Imaging Eligible 34 Diagnostic Referrals
DME Ordering Eligible 34 Durable Medical Equipment
Home Health Agency Referrals 34 HHA Ordering Eligible
Showing 1โ€“20 of 39 providers
With recent CMS data first, then Aโ€“Z

Dr. Zaid Alkaissy , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
6020 E Arbor Ave Ste 101, Mesa, AZ 852066102
Phone: 4809851700
NPI Identifier 1285290445
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Dr. Sara Elizabeth Ancello , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
3638 E Southern Ave Ste C101, Mesa, AZ 852062563
Phone: 4805643763
NPI Identifier 1720420557
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Dr. Doo-Sang Cho , MD

Internal Medicine - Gastroenterology

Active NPI Status
6020 E Arbor Ave, #101, Mesa, AZ 852066102
Phone: 4809851700
NPI Identifier 1750376778
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Howard Chung

Internal Medicine - Gastroenterology

Active NPI Status
1301 S Crismon Rd Apt 3021, Mesa, AZ 852093767
Phone: 3232037030
NPI Identifier 1497246615
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Dr. Andrew K Collins , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
6020 E Arbor Ave Ste 101, Mesa, AZ 852066102
Phone: 4809851700
NPI Identifier 1740275338
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Dr. Elisa M Faybush , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3048 E Baseline Rd, Suite 105, Mesa, AZ 852047286
Phone: 4805456060
NPI Identifier 1538264684
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Dr. Philip Gregory Foutch , DO

Internal Medicine - Gastroenterology

Active NPI Status
603 W Baseline Rd Ste 200, Mesa, AZ 852106047
Phone: 4804611088
NPI Identifier 1790746717
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Dr. Brian Fung , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
603 W Baseline Rd Ste 200, Mesa, AZ 852106051
Phone: 4804611088
NPI Identifier 1366974164
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Dr. Andrew J. Grade , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
603 W Baseline Rd Ste 200, Mesa, AZ 852106047
Phone: 4804611088
NPI Identifier 1881655819
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Dr. Matthew Paul Jackson , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
4540 E Baseline Rd Ste 115, Mesa, AZ 852064617
Phone: 4803066405
NPI Identifier 1265813349
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Dr. Lokesh Kumar Jha , MD

Internal Medicine - Gastroenterology

Active NPI Status
1432 S Dobson Rd Ste 107, Mesa, AZ 852024769
Phone: 4806814453
NPI Identifier 1245439223
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Dr. Steven C Kaiser , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
4540 E Baseline Rd, Suite 115, Mesa, AZ 852064613
Phone: 4803066405
NPI Identifier 1346219433
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Dr. Nilay Hasmukh Kavathia , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
603 W Baseline Rd Ste 200, Mesa, AZ 852106047
Phone: 4804611088
NPI Identifier 1174796999
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Dr. Sameeha Khalid , DO

Internal Medicine - Gastroenterology

Active NPI Status
1301 S Crismon Rd, Mesa, AZ 852093767
Phone: 4803586100
NPI Identifier 1114489705
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Dr. Jae H. Kim , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
10238 E Hampton Ave Ste 205, Mesa, AZ 852093318
Phone: 4808568252
NPI Identifier 1861578759
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Dr. Prashant Vasanth Krishnan , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
5555 E Baseline Rd, Mesa, AZ 852064709
Phone: 4803930575
NPI Identifier 1689883993
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Dr. Prem C Kumar , MD

Internal Medicine - Gastroenterology

Active NPI Status
215 S Power Rd, 102, Mesa, AZ 85206
Phone: 4809859005
NPI Identifier 1700841350
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Dr. David B Leff , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
3638 E Southern Ave Ste C101, Mesa, AZ 852062563
Phone: 4805643763
NPI Identifier 1619956505
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Dr. Alpesh Patel , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
10238 E Hampton Ave Ste 205, Mesa, AZ 852093318
Phone: 4808568252
NPI Identifier 1003906751
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Dr. Raxitkumar Bhupendrakumar Patel , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
4540 E Baseline Rd Ste 115, Mesa, AZ 852064617
Phone: 4803066405
NPI Identifier 1881989820
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Frequently Asked Questions about Internal Medicine - Gastroenterology in Mesa

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 Arizona 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.