John Andrew Giffen, APRN
NPI 1184270068ActiveIndividual· Nurse Practitioner, Psych/Mental Health· Nashville, TN
Nurse Practitioner, Psych/Mental Health (APRN) with Centerstone of Tennessee, Inc., practicing in Nashville, Tennessee. Their prescriptions cost Medicare Part D more than their services did: $308,437 for 2,238 claims, against $6,434 paid for services in 2024. Abbvie Inc. was the largest of 9 companies reporting payments in 2025, $538.70 in all, mostly food and beverage.
Overview
| NPI | 1184270068 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APRN |
| Sole proprietor | No |
| NPI issued | Aug 15, 2019 |
| Last updated in NPPES | Oct 31, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Psych/Mental Health Primary | 363LP0808X | 26636 | TN |
| Registered Nurse | 163W00000X | 233107 | TN |
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 (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 30 |
|---|---|
| Services billed | 113 across 2 procedure codes |
| Paid by Medicare | $6,434 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,238 · 3,095 30-day fills |
|---|---|
| Patients | 129 |
| Total drug cost | $308,437 |
| Generic share | 95% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Centerstone of Tennessee, Inc.Waynesboro, TN · 128 clinicians
Industry payments (Open Payments)
- 2025$538.70 · 38 payments from 9 companies
- 2024$710.77 · 46 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $213.24 | 23 |
| Alkermes, Inc. | $112.85 | 5 |
| Vanda Pharmaceuticals Inc. | $44.24 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $38.73 | 1 |
| Teva Pharmaceuticals USA, Inc. | $34.54 | 2 |
What the 2025 payments were for
- Food and Beverage$538.70 · 38 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 340 psychiatric nurse practitioners in Nashville · All psychiatric nurse practitioners in Tennessee