Independent US Healthcare Provider Directory & Public Medical Database Patient Guides
Medical Specialty Listing

Internal Medicine - Gastroenterology Specialists in Ann Arbor, MI

Browse 94 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in Ann Arbor, Michigan.

94 Healthcare Providers

How Ann Arbor compares with the U.S.

Ann Arbor has 77 clinicians in Internal Medicine - Gastroenterology per 100,000 residents, 12.5 times the U.S. rate of 6.2.

That is 94 active clinicians in Internal Medicine - Gastroenterology with a practice address in Ann Arbor, for a population of 122,036.

The Michigan 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. 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.

100% of clinicians in Internal Medicine - Gastroenterology in Ann Arbor listed in the CMS Medicare file (76 of 76) accept Medicare assignment. That is similar to the Michigan share of 99%.

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.

86% of clinicians in Internal Medicine - Gastroenterology in Ann Arbor listed in the CMS Medicare file (65 of 76) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the Michigan share of 52%.

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 Ann Arbor, MI

Source: CMS PECOS
PECOS Enrolled Specialists 85 In Ann Arbor, MI
Part B Lab & Imaging Eligible 86 Diagnostic Referrals
DME Ordering Eligible 88 Durable Medical Equipment
Home Health Agency Referrals 86 HHA Ordering Eligible
Showing 1โ€“20 of 94 providers
With recent CMS data first, then Aโ€“Z

Dr. Leslie B Aldrich , MD

Internal Medicine - Gastroenterology

Active NPI Status
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1891877312
View Full Profile

Dr. Frederick K Askari , MD, PhD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1689756108
View Full Profile

Dr. Aarti Oza Bedi , MD

Internal Medicine - Gastroenterology

Active NPI Status
1500 East Medical Center Dr, 2nd Floor University Hospital Recp 2b355, Ann Arbor, MI 481095051
Phone: 7349369250
NPI Identifier 1720284987
View Full Profile

Dr. Jeffrey Aaron Berinstein , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1023492519
View Full Profile

Dr. Shrinivas Bishu , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 East Medical Center Drive, 3rd Floor Taubman Center, Ann Arbor, MI 481095362
Phone: 7346475944
NPI Identifier 1700010063
View Full Profile

Dr. Graham F. Brady , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 E Medical Center Dr, 1st Floor Taubman Center Recp G, Ann Arbor, MI 481095334
Phone: 8003339013
NPI Identifier 1831482702
View Full Profile

Dr. Marc Taylor Cantwell , MD, PhD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349365000
NPI Identifier 1962027292
View Full Profile

Dr. Eileen So Carpenter , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1518345495
View Full Profile

Dr. Joy Weiling Chang , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 East Medical Center Dr, 3rd Floor Taubman Center Recp D, Ann Arbor, MI 481095382
Phone: 7346475944
NPI Identifier 1194091827
View Full Profile

Dr. Joan Weichun Chen , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 East Medical Center Dr, 3rd Floor Taubman Center Recp D, Ann Arbor, MI 481095362
Phone: 7346475944
NPI Identifier 1932371713
View Full Profile

Dr. Vincent Lingzhi Chen , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1740624808
View Full Profile

Dr. William D Chey , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1487736906
View Full Profile

Dr. Shirley Ann Cohen-Mekelburg , MD

Internal Medicine - Gastroenterology

Active NPI Status
1500 East Medical Center Dr, 3rd Floor Taubman Center Recp D, Ann Arbor, MI 481095362
Phone: 7346475944
NPI Identifier 1417222696
View Full Profile

Dr. Hari S Conjeevaram , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1831271360
View Full Profile

Dr. Ngoc-Duyen Thi Dang , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 East Medical Center Dr, 3rd Floor Taubman Ctr Recp D, Ann Arbor, MI 481095362
Phone: 7346475944
NPI Identifier 1386726818
View Full Profile

Dr. Sonja P Dawsey , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1417376286
View Full Profile

Dr. John Del Valle , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1003998535
View Full Profile

Dr. Grace H Elta , MD

Internal Medicine - Gastroenterology

Active NPI Status
1500 East Medical Center Dr, 3rd Floor Taubman Ctr Recp D, Ann Arbor, MI 481095362
Phone: 7346475944
NPI Identifier 1275615700
View Full Profile

Dr. Shanti Lynne Eswaran , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1104099852
View Full Profile

Dr. Ryan Scott Fauble , MD

Internal Medicine - Gastroenterology

Active NPI Status
1500 E Medical Center Dr, Ann Arbor, MI 481095000
Phone: 7349364000
NPI Identifier 1427170166
View Full Profile

Frequently Asked Questions about Internal Medicine - Gastroenterology in Ann Arbor

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 Michigan 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.