Robert A. Chang, MD
NPI 1093712093ActiveIndividual· Internal Medicine· Mount Clemens, MI
Internal Medicine (MD) with Henry Ford Macomb Hospital Corporation and 1 other group, practicing in Mount Clemens, Michigan. Their prescriptions cost Medicare Part D more than their services did: $1,216,749 for 11,614 claims, against $54,631 paid for services in 2024. Aimmune Therapeutics, Inc. was the largest of 10 companies reporting payments in 2025, $313.42 in all, mostly food and beverage. Lists Henry Ford Health Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1093712093 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 5, 2005 |
| Last updated in NPPES | Dec 22, 2020 |
| Certified by provider | Dec 22, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 4301054727 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 258 |
|---|---|
| Services billed | 1,726 across 52 procedure codes |
| Paid by Medicare | $54,631 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,614 · 26,115 30-day fills |
|---|---|
| Patients | 642 |
| Total drug cost | $1,216,749 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1986 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical groups
- Henry Ford Macomb Hospital CorporationSterling Heights, MI · 355 clinicians
- Henry Ford Physician PartnersChesterfield, MI · 79 clinicians
Hospital affiliations
- Henry Ford Health HospitalDetroit, MI
- Henry Ford Macomb HospitalClinton Township, MI
Other facilities
- Henry Ford Home Health CareHome health agency · Detroit, MI
Industry payments (Open Payments)
- 2025$313.42 · 18 payments from 10 companies
- 2024$690.72 · 34 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Aimmune Therapeutics, Inc. | $75.50 | 4 |
| Pfizer Inc. | $46.52 | 2 |
| Amgen Inc. | $44.57 | 3 |
| Novo Nordisk Inc | $34.70 | 2 |
| Glaxosmithkline, LLC. | $32.55 | 2 |
What the 2025 payments were for
- Food and Beverage$313.42 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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