John Maclin Barnwell Sr., M.D.
NPI 1831105550ActiveIndividual· Surgery, Surgical Oncology· Detroit, MI
Surgery, Surgical Oncology (M.D.) in Detroit, Michigan, trained at Howard University College of Medicine (class of 1989). Mostly services rather than prescriptions: Medicare paid $54,540 for 164 patients in 2024, with only 32 Part D claims. Davol Inc. was the largest of 5 companies reporting payments in 2025, $2,325 in all, mostly travel and lodging.
Overview
| NPI | 1831105550 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 1, 2006 |
| Last updated in NPPES | Sep 9, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery, Surgical Oncology Primary | 2086X0206X | JB071944 | 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 - General Surgery (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 164 |
|---|---|
| Services billed | 401 across 71 procedure codes |
| Paid by Medicare | $54,540 |
Part D prescriptions in 2024
| Prescriptions (claims) | 32 · 40 30-day fills |
|---|---|
| Patients | 25 |
| Total drug cost | $467.43 |
| Generic share | 97% of claims |
Education and affiliations
| Medical school | Howard University College of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | General Surgery |
Medical group
- United Trauma Care PLCDetroit, MI · 7 clinicians
Hospital affiliations
- Ascension Providence Hospital, Southfield and NoviSouthfield, MI
- Harper University HospitalDetroit, MI
- Huron Valley-Sinai HospitalCommerce Township, MI
- Sinai-Grace HospitalDetroit, MI
Industry payments (Open Payments)
- 2025$2,325 · 14 payments from 5 companies
- 2024$312.13 · 5 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Davol Inc. | $2,159 | 8 |
| Baxter Healthcare | $68.00 | 1 |
| Incyte Corporation | $46.53 | 2 |
| Tela Bio, Inc. | $32.08 | 2 |
| Mimedx Group, Inc. | $18.73 | 1 |
What the 2025 payments were for
- Travel and Lodging$1,791 · 3 payments
- Food and Beverage$533.32 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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