David M. Zimmerman, M.D.
NPI 1639148232ActiveIndividual· Internal Medicine, Hematology & Oncology· Fort Wayne, IN
Internal Medicine, Hematology & Oncology (M.D.) in Fort Wayne, Indiana, trained at Indiana University School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $5,867,190 for 1,901 claims, against $2,229,899 paid for services in 2024. Caris Mpi, Inc. was the largest of 31 companies reporting payments in 2025, $3,259 in all, mostly food and beverage.
Overview
| NPI | 1639148232 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 16, 2006 |
| Last updated in NPPES | May 15, 2025 |
| Certified by provider | May 15, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 01050092A | IN |
| Internal Medicine, Medical Oncology | 207RX0202X | 01050092A | IN |
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 - Hematology/Oncology (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 582 |
|---|---|
| Services billed | 117,794 across 136 procedure codes |
| Paid by Medicare | $2,229,899 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,901 · 2,765 30-day fills |
|---|---|
| Patients | 328 |
| Total drug cost | $5,867,190 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
Medical group
- American Oncology Partners PAFort Wayne, IN · 391 clinicians
Hospital affiliations
- Adams Memorial HospitalDecatur, IN
- Cameron HealthAngola, IN
- Dupont Hospital LLCFort Wayne, IN
- Lutheran Hospital of IndianaFort Wayne, IN
- Parkview Huntington HospitalHuntington, IN
Industry payments (Open Payments)
- 2025$3,259 · 89 payments from 31 companies
- 2024$4,810 · 107 payments from 31 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Caris Mpi, Inc. | $1,023 | 2 |
| Janssen Biotech, Inc. | $287.41 | 10 |
| Merck Sharp & Dohme LLC | $241.75 | 14 |
| Karyopharm Therapeutics Inc. | $240.73 | 2 |
| E.R. Squibb & Sons, L.L.C. | $216.44 | 14 |
What the 2025 payments were for
- Food and Beverage$2,326 · 86 payments
- Consulting Fee$900.00 · 1 payment
- Education$32.42 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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