John McCarthy, CRNP
NPI 1952814634ActiveIndividual· Nurse Practitioner, Family· Gaithersburg, MD
Nurse Practitioner, Family (CRNP) with Adventist Physician Services Inc, practicing in Gaithersburg, Maryland. Their prescriptions cost Medicare Part D more than their services did: $114,266 for 1,379 claims, against $41,184 paid for services in 2024. Zoll Services LLC (A/K/A Zoll Lifecor Corp) was the largest of 8 companies reporting payments in 2025, $234.49 in all, mostly food and beverage. Lists Adventist Healthcare Shady Grove Medical Center as a hospital affiliation.
Overview
| NPI | 1952814634 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | CRNP |
| Sole proprietor | No |
| NPI issued | Nov 16, 2017 |
| Last updated in NPPES | Nov 16, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | R135272 | MD |
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 - Nurse Practitioner (DC); Practitioner - Nurse Practitioner (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 396 |
|---|---|
| Services billed | 600 across 31 procedure codes |
| Paid by Medicare | $41,184 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,379 · 3,376 30-day fills |
|---|---|
| Patients | 241 |
| Total drug cost | $114,266 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2013 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Adventist Physician Services IncSilver Spring, MD · 148 clinicians
Hospital affiliation
- Adventist Healthcare Shady Grove Medical CenterRockville, MD
Industry payments (Open Payments)
- 2025$234.49 · 11 payments from 8 companies
- 2024$73.13 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $49.63 | 2 |
| Astrazeneca Pharmaceuticals LP | $40.29 | 2 |
| Pfizer Inc. | $33.46 | 2 |
| Glaxosmithkline, LLC. | $25.85 | 1 |
| Novartis Pharmaceuticals Corporation | $22.78 | 1 |
What the 2025 payments were for
- Food and Beverage$234.49 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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