John Bak, CRNP
NPI 1235770702ActiveIndividual· Nurse Practitioner· Danville, PA
Nurse Practitioner (CRNP) with Geisinger Clinic and 2 other groups, practicing in Danville, Pennsylvania. Their prescriptions cost Medicare Part D more than their services did: $256,828 for 1,817 claims, against $20,129 paid for services in 2024. Abiomed reported $112.49 in payments in 2025, mostly food and beverage. Lists Geisinger Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1235770702 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | CRNP |
| Sole proprietor | No |
| NPI issued | Oct 4, 2019 |
| Last updated in NPPES | Feb 3, 2026 |
| Certified by provider | Feb 3, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | SP020925 | PA |
| Nurse Practitioner, Critical Care Medicine | 363LC0200X | SP020925 | 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 - Nurse Practitioner (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 213 |
|---|---|
| Services billed | 669 across 16 procedure codes |
| Paid by Medicare | $20,129 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,817 · 4,014 30-day fills |
|---|---|
| Patients | 342 |
| Total drug cost | $256,828 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical groups
- Geisinger ClinicDanville, PA · 3,467 clinicians
- Geisinger-Hm Joint Venture LLCMontoursville, PA · 422 clinicians
- Evangelical Medical Services OrganizationLewisburg, PA · 248 clinicians
Hospital affiliations
- Geisinger Medical CenterDanville, PA
- Geisinger-Bloomsburg HospitalBloomsburg, PA
- Wellspan Evangelical Community HospitalLewisburg, PA
Industry payments (Open Payments)
- 2025$112.49 · 3 payments from 1 company
- 2024$113.92 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abiomed | $112.49 | 3 |
What the 2025 payments were for
- Food and Beverage$112.49 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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