William D. Chey, MD
NPI 1487736906ActiveIndividual· Internal Medicine, Gastroenterology· Ann Arbor, MI
Internal Medicine, Gastroenterology (MD) in Ann Arbor, Michigan, trained at Emory University School of Medicine (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $146,897 for 392 claims, against $7,515 paid for services in 2024. Eli Lilly and Company was the largest of 6 companies reporting payments in 2025, $2,984 in all, mostly consulting fees.
Overview
| NPI | 1487736906 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 20, 2006 |
| Last updated in NPPES | Jun 24, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 4301056884 | MI |
| Internal Medicine | 207R00000X | 4301056884 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 63 |
|---|---|
| Services billed | 108 across 18 procedure codes |
| Paid by Medicare | $7,515 |
Part D prescriptions in 2024
| Prescriptions (claims) | 392 · 680 30-day fills |
|---|---|
| Patients | 73 |
| Total drug cost | $146,897 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Emory University School of Medicine |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Regents of the University of MichiganAnn Arbor, MI · 3,346 clinicians
Hospital affiliation
- University of Michigan Health SystemAnn Arbor, MI
Industry payments (Open Payments)
- 2025$2,984 · 12 payments from 6 companies
- 2024$6,695 · 16 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Eli Lilly and Company | $2,250 | 2 |
| Anx Robotica Corp | $253.05 | 3 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $229.54 | 4 |
| Blueprint Medicines Corporation | $123.10 | 1 |
| Ardelyx, Inc. | $103.60 | 1 |
What the 2025 payments were for
- Consulting Fee$2,250 · 2 payments
- Food and Beverage$733.84 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 96 gastroenterologists in Ann Arbor · All gastroenterologists in Michigan