Jonathan Zimmerman, MD
NPI 1609856897ActiveIndividual· Internal Medicine· Greenwich, CT
Internal Medicine (MD) in Greenwich, Connecticut, licensed in CT, with an NPI issued in January 2006. Their prescriptions cost Medicare Part D more than their services did: $526,740 for 4,249 claims, against $25,283 paid for services in 2024. Amgen Inc. was the largest of 3 companies reporting payments in 2025, $66.32 in all, mostly food and beverage.
Overview
| NPI | 1609856897 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 23, 2006 |
| Last updated in NPPES | May 7, 2025 |
| Certified by provider | May 7, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 79246 | CT |
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 - Internal Medicine (CT); Practitioner - Internal Medicine (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 130 |
|---|---|
| Services billed | 367 across 28 procedure codes |
| Paid by Medicare | $25,283 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,249 · 8,968 30-day fills |
|---|---|
| Patients | 278 |
| Total drug cost | $526,740 |
| Generic share | 80% of claims |
Industry payments (Open Payments)
- 2025$66.32 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $35.00 | 1 |
| Viiv Healthcare Company | $16.18 | 1 |
| Exact Sciences Corporation | $15.14 | 1 |
What the 2025 payments were for
- Food and Beverage$66.32 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Greenwich
- 1053407304
- 1073734935
- 1376539213
- 1417052382
- 1437239621
- 1558741728
- 1568679736
- 1609075324
- 1710974530
- 1861524829
- 1992965396
- 1265649073
All 73 internal medicine physicians in Greenwich · All internal medicine physicians in Connecticut