Mark Yat-Fung Chiang, MD
NPI 1720034986ActiveIndividual· Internal Medicine, Hematology· Ann Arbor, MI
Internal Medicine, Hematology (MD) in Ann Arbor, Michigan, trained at Perelman School of Med at the University of Pennsylvania (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $993,237 for 62 claims, against $5,622 paid for services in 2024.
Overview
| NPI | 1720034986 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 26, 2006 |
| Last updated in NPPES | Sep 23, 2025 |
| Certified by provider | Sep 23, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology Primary | 207RH0000X | 4301095754 | MI |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 4301095754 | MI |
| Internal Medicine, Medical Oncology | 207RX0202X | 4301095754 | MI |
| Internal Medicine, Hematology & Oncology | 207RH0003X | MD422545 | PA |
| Internal Medicine | 207R00000X | 4301095754 | 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 - Hematology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 44 |
|---|---|
| Services billed | 57 across 7 procedure codes |
| Paid by Medicare | $5,622 |
Part D prescriptions in 2024
| Prescriptions (claims) | 62 · 116 30-day fills |
|---|---|
| Patients | 15 |
| Total drug cost | $993,237 |
| Generic share | 31% of claims |
Education and affiliations
| Medical school | Perelman School of Med at the University of Pennsylvania |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Hematology |
| Secondary specialties | Hematology/Oncology, 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)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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