Peter John Drennan, D.O.
NPI 1629043625ActiveIndividual· Internal Medicine· Enfield, CT
Internal Medicine (D.O.) in Enfield, Connecticut, trained at University of New England, College of Osteo Medicine (class of 1983). Their prescriptions cost Medicare Part D more than their services did: $435,798 for 6,218 claims, against $106,413 paid for services in 2024.
Overview
| NPI | 1629043625 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Feb 22, 2006 |
| Last updated in NPPES | May 11, 2026 |
| Certified by provider | May 11, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 64560 | CT |
| Internal Medicine | 207R00000X | 54104 | MA |
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 (CT); Practitioner - Internal Medicine (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 282 |
|---|---|
| Services billed | 1,547 across 33 procedure codes |
| Paid by Medicare | $106,413 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,218 · 13,346 30-day fills |
|---|---|
| Patients | 452 |
| Total drug cost | $435,798 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of New England, College of Osteo Medicine |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Baystate Medical Practices IncSpringfield, MA · 1,369 clinicians
- Springfield Medical Associates, Inc.Enfield, CT · 10 clinicians
Hospital affiliations
- Baystate Medical CenterSpringfield, MA
- Baystate Wing HospitalPalmer, MA
- Mercy Medical CtrSpringfield, MA
Other facilities
- Amedisys Home Health CareHome health agency · Agawam, MA
- Baystate Home HealthHome health agency · W Springfield, MA
- CaretendersHome health agency · Holyoke, MA
- Encompass Health Home HealthHome health agency · Ludlow, MA
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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