John Marcelis, MD
NPI 1285667105ActiveIndividual· Internal Medicine, Geriatric Medicine· Warminster, PA
Internal Medicine, Geriatric Medicine (MD) in Warminster, Pennsylvania, trained at Temple University School of Medicine (class of 1987). 337 Medicare patients in 2024, $90,573 paid; nearly all of their 2,101 Part D prescriptions were generic (93%).
Overview
| NPI | 1285667105 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 7, 2006 |
| Last updated in NPPES | Feb 26, 2026 |
| Certified by provider | Feb 26, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Geriatric Medicine Primary | 207RG0300X | MD045170E | PA |
| Internal Medicine, Geriatric Medicine | 207RG0300X | NJDCATEMP-025750 | NJ |
| Internal Medicine | 207R00000X | MD045170E | PA |
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 (PA); Practitioner - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 337 |
|---|---|
| Services billed | 1,645 across 41 procedure codes |
| Paid by Medicare | $90,573 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,101 · 4,123 30-day fills |
|---|---|
| Patients | 194 |
| Total drug cost | $99,036 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | Temple University School of Medicine |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Internal Medicine |
Medical group
- Erickson Health Medical Group of Pennsylvania PCGlen Mills, PA · 20 clinicians
Other facilities
- Ann's Choice Visiting Nurse ServicesHome health agency · Warminster, PA
- Ann's ChoiceNursing home · Warminster, PA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Geriatric Medicine providers in Warminster
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