Alan Abraham Buffenstein, M.D
NPI 1639278104ActiveIndividual· Psychiatry & Neurology, Psychiatry· Honolulu, HI
Psychiatry & Neurology, Psychiatry (M.D) in Honolulu, Hawaii, licensed in HI, with an NPI issued in September 2006. Their prescriptions cost Medicare Part D more than their services did: $728,150 for 2,473 claims, against $21,979 paid for services in 2024. Janssen Pharmaceuticals, Inc was the largest of 6 companies reporting payments in 2025, $566.94 in all, mostly food and beverage.
Overview
| NPI | 1639278104 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | Yes |
| NPI issued | Sep 21, 2006 |
| Last updated in NPPES | Feb 1, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 5407 | HI |
| Psychiatry & Neurology, Geriatric Psychiatry | 2084P0805X | 5407 | HI |
| Psychiatry & Neurology, Pain Medicine | 2084P2900X | 5407 | HI |
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 (HI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 32 |
|---|---|
| Services billed | 284 across 11 procedure codes |
| Paid by Medicare | $21,979 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,473 · 2,822 30-day fills |
|---|---|
| Patients | 82 |
| Total drug cost | $728,150 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1977 |
|---|---|
| Medicare specialty | Psychiatry |
| Secondary specialties | Geriatric Psychiatry |
| Telehealth | Offers telehealth |
Industry payments (Open Payments)
- 2025$566.94 · 13 payments from 6 companies
- 2024$1,161 · 18 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Pharmaceuticals, Inc | $198.31 | 8 |
| E.R. Squibb & Sons, L.L.C. | $116.72 | 1 |
| Teva Pharmaceuticals USA, Inc. | $106.50 | 1 |
| Astrazeneca Pharmaceuticals LP | $104.17 | 1 |
| Alkermes, Inc. | $22.24 | 1 |
What the 2025 payments were for
- Food and Beverage$460.44 · 12 payments
- Education$106.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 222 psychiatrists in Honolulu · All psychiatrists in Hawaii