John P. Brennan, MD
Internal Medicine, Pulmonary Disease (MD) in Exeter, New Hampshire, trained at Tufts University School of Medicine (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $1,278,862 for 3,337 claims, against $115,606 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 2 companies reporting payments in 2025, $115.94 in all, mostly food and beverage. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1851339071 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 2, 2006 |
| Last updated in NPPES | Feb 24, 2020 |
| Certified by provider | Feb 24, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 13816 | NH |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 13816 | NH |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in New Hampshire, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | John F Jr Brennan · Nurse/Nurses Aide | 1128b4 | Oct 20, 2011 | Lebanon, NH |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | Possible (name) | See above |
| 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 - Pulmonary Disease (NH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 658 |
|---|---|
| Services billed | 1,873 across 56 procedure codes |
| Paid by Medicare | $115,606 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,337 · 4,592 30-day fills |
|---|---|
| Patients | 513 |
| Total drug cost | $1,278,862 |
| Generic share | 45% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
| Telehealth | Offers telehealth |
Medical groups
- Elliot Professional ServicesManchester, NH · 427 clinicians
- Core Physicians LLCExeter, NH · 289 clinicians
Hospital affiliations
- Elliot HospitalManchester, NH
- Exeter Hospital IncExeter, NH
- Lahey Hospital & Medical Center, BurlingtonBurlington, MA
- Portsmouth Regional HospitalPortsmouth, NH
Other facilities
- Beth Israel Lahey Health at HomeHospice · Exeter, NH
Industry payments (Open Payments)
- 2025$115.94 · 2 payments from 2 companies
- 2024$75.54 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $93.16 | 1 |
| Medtronic, Inc. | $22.78 | 1 |
What the 2025 payments were for
- Food and Beverage$115.94 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Pulmonary Disease providers in Exeter
- 1154381374
- 1194751743
All Internal Medicine, Pulmonary Disease providers in New Hampshire →