HealthcareDiscovery.AI / Doctors / Michigan / Ann Arbor / Internal Medicine

Internal Medicine in Ann Arbor, Michigan

Data updated monthly · Last refresh September 2026

478 Internal Medicine providers practice in Ann Arbor, and 12% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Internal Medicine providers in Ann Arbor

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. Timothy Barth, M.D.
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 994-1190
Dr. Timothy Hofer, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-5582
Dr. Todd Koelling, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · Telehealth · (734) 936-4000
Dr. Tori Clouse, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-4000
Dr. Tristan Feierabend, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 647-2892
Dr. Ulka Vaishampayan, MD
Ann Arbor, MI · $70,927 in drug and device payments (2025) · Telehealth · (734) 936-4000
Dr. Vanessa Wagner, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · Telehealth · (734) 998-7380
Dr. Vernon Stevenson, M.D.
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 769-3333
Dr. Victor Lin, DO
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-4280
Dr. Vikas Parekh, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-4000
Dr. Vikas Singh, MD
Ann Arbor, MI · $17 in drug and device payments (2025) · (734) 936-9556
Dr. Vincent Young, M.D., PHD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 647-5899
Dr. Virginia Sheffield, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-4000
Dr. Vishwaratn Asthana, MD, PHD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-4000
Dr. Warangkna Boonyapisit, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 763-7392
Dr. William Barrie, M.D.
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-5582
Dr. William Nasso, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 975-5000
Dr. William Repaskey, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-4000
Dr. Xian Chen, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 647-5650
Dr. Yangyang Zhang, MD
Ann Arbor, MI · $169 in drug and device payments (2025) · (734) 936-4000
Dr. Yazan Abu Omar, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-4000
Dr. Yeong Kwok, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · Telehealth · (349) 982-0207
Dr. Yiding Cai, MD
Ann Arbor, MI · $54 in drug and device payments (2025) · Telehealth · (734) 995-0303
Dr. Yik Hon Marc Cheng, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-6858
Dr. Yusuf Alawadhi, MD
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-4000
Dr. Zachary Boltwood, D.O.
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-5582
Dr. Zachary Haupt, M.D.
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 769-7100
Dr. Zeinab Mohammadi, DO
Ann Arbor, MI · No drug or device payments recorded (2025) · (734) 936-4000

Conditions Internal Medicine providers in Ann Arbor, Michigan commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Internal Medicine providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Internal Medicine providers are in Ann Arbor, Michigan?

There are 478 Internal Medicine providers with active NPI records practicing in Ann Arbor, according to federal NPPES data refreshed monthly.

How many Internal Medicine providers in Ann Arbor received drug or device company payments?

56 of 478 (12%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Internal Medicine providers in Ann Arbor treat?

Internal Medicine providers in Ann Arbor commonly treat high blood pressure, type 2 diabetes, high cholesterol, preventive care, chronic disease management and related conditions. Individual practices vary, so confirm with the provider before booking.

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 Ann Arbor Internal Medicine across Michigan

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.