Anna Suk-Fong Lok, MD
NPI 1013090935ActiveIndividual· Internal Medicine, Gastroenterology· Ann Arbor, MI
Internal Medicine, Gastroenterology (MD) with Regents of the University of Michigan, practicing in Ann Arbor, Michigan. Their prescriptions cost Medicare Part D more than their services did: $171,487 for 584 claims, against $14,853 paid for services in 2024. Gilead Sciences, Inc. reported $105.13 in payments in 2025, mostly food and beverage. Lists Covenant Medical Center and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1013090935 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 23, 2006 |
| Last updated in NPPES | Nov 5, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 4301067002 | MI |
| Internal Medicine | 207R00000X | 4301067002 | MI |
| Internal Medicine, Hepatology | 207RI0008X | 4301067002 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 160 |
|---|---|
| Services billed | 283 across 17 procedure codes |
| Paid by Medicare | $14,853 |
Part D prescriptions in 2024
| Prescriptions (claims) | 584 · 1,243 30-day fills |
|---|---|
| Patients | 110 |
| Total drug cost | $171,487 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 1977 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Regents of the University of MichiganAnn Arbor, MI · 3,346 clinicians
Hospital affiliations
- Covenant Medical CenterSaginaw, MI
- Spectrum HealthGrand Rapids, MI
- University of Michigan Health SystemAnn Arbor, MI
- Wyandotte Hospital and Medical CenterWyandotte, MI
Industry payments (Open Payments)
- 2025$105.13 · 1 payment from 1 company
- 2024$9,943 · 5 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $105.13 | 1 |
What the 2025 payments were for
- Food and Beverage$105.13 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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