Samuel Osifo Okpaku, M.D.PHD
NPI 1427070879ActiveIndividual· Psychiatry & Neurology, Psychiatry· Nashville, TN
Psychiatry & Neurology, Psychiatry (M.D.PHD) in Nashville, Tennessee, licensed in TN, with an NPI issued in July 2006. 35 Medicare patients in 2024, $25,140 paid; nearly all of their 770 Part D prescriptions were generic (98%). Vanda Pharmaceuticals Inc. was the largest of 9 companies reporting payments in 2025, $1,405 in all, mostly food and beverage.
Overview
| NPI | 1427070879 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D.PHD |
| Sole proprietor | Yes |
| NPI issued | Jul 24, 2006 |
| Last updated in NPPES | Feb 3, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 18327 | 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 - Psychiatry (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 35 |
|---|---|
| Services billed | 504 across 3 procedure codes |
| Paid by Medicare | $25,140 |
Part D prescriptions in 2024
| Prescriptions (claims) | 770 · 873 30-day fills |
|---|---|
| Patients | 97 |
| Total drug cost | $29,491 |
| Generic share | 98% of claims |
Education and affiliations
| Graduation year | 1968 |
|---|---|
| Medicare specialty | Psychiatry |
| Secondary specialties | Geriatric Psychiatry |
Industry payments (Open Payments)
- 2025$1,405 · 26 payments from 9 companies
- 2024$274.27 · 7 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vanda Pharmaceuticals Inc. | $299.76 | 8 |
| Axsome Therapeutics, Inc. | $259.45 | 3 |
| Alkermes, Inc. | $244.62 | 2 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $212.08 | 4 |
| E.R. Squibb & Sons, L.L.C. | $148.64 | 3 |
What the 2025 payments were for
- Food and Beverage$1,405 · 26 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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