John J. Messmer, MD
NPI 1669437414ActiveIndividual· Family Medicine· Palmyra, PA
Family Medicine (MD) in Palmyra, Pennsylvania, trained at Pennsylvania State University College of Medicine (class of 1977). Their prescriptions cost Medicare Part D more than their services did: $490,251 for 6,888 claims, against $24,829 paid for services in 2024. Amgen Inc. reported $111.45 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1669437414 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 17, 2006 |
| Last updated in NPPES | Nov 16, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | MD020821E | PA |
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 - Family Practice (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 176 |
|---|---|
| Services billed | 627 across 41 procedure codes |
| Paid by Medicare | $24,829 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,888 · 13,415 30-day fills |
|---|---|
| Patients | 486 |
| Total drug cost | $490,251 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Pennsylvania State University College of Medicine |
|---|---|
| Graduation year | 1977 |
| Medicare specialty | Family Practice |
Medical group
- The Milton S Hershey Medical Center Physicians GroupHershey, PA · 1,623 clinicians
Hospital affiliations
- Milton S Hershey Medical CenterHershey, PA
- Upmc Pinnacle HospitalsHarrisburg, PA
- Wellspan Good Samaritan HospitalLebanon, PA
Other facilities
- Residential Home Health of Carlisle, LLCHome health agency · Mechanicsburg, PA
- Choices HealthcareHospice · Lancaster, PA
- Lebanon Valley Brethren HomeNursing home · Palmyra, PA
Industry payments (Open Payments)
- 2025$111.45 · 1 payment from 1 company
- 2024$146.62 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $111.45 | 1 |
What the 2025 payments were for
- Food and Beverage$111.45 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 24 family medicine physicians in Palmyra · All family medicine physicians in Pennsylvania