Chayanin Hamada, M.D.
NPI 1639603566ActiveIndividual· Psychiatry & Neurology, Child & Adolescent Psychiatry· Honolulu, HI
Psychiatry & Neurology, Child & Adolescent Psychiatry (M.D.) with The Queens Medical Center, practicing in Honolulu, Hawaii. Enrolled in Medicare as practitioner - psychiatry. Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) was the largest of 4 companies reporting payments in 2025, $325.85 in all, mostly food and beverage. Lists The Queens Medical Center as a hospital affiliation.
Overview
| NPI | 1639603566 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 18, 2017 |
| Last updated in NPPES | Mar 19, 2025 |
| Certified by provider | Aug 9, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Child & Adolescent Psychiatry Primary | 2084P0804X | MD-22173 | HI |
| Psychiatry & Neurology, Child & Adolescent Psychiatry | 2084P0804X | ETELL344284681 | MA |
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) |
|---|
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Psychiatry |
| Telehealth | Offers telehealth |
Medical group
- The Queens Medical CenterHonolulu, HI · 192 clinicians
Hospital affiliation
- The Queens Medical CenterHonolulu, HI
Industry payments (Open Payments)
- 2025$325.85 · 11 payments from 4 companies
- 2024$54.30 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $106.19 | 3 |
| Teva Pharmaceuticals USA, Inc. | $98.06 | 4 |
| Abbvie Inc. | $86.74 | 3 |
| Janssen Pharmaceuticals, Inc | $34.86 | 1 |
What the 2025 payments were for
- Food and Beverage$325.85 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 37 child and adolescent psychiatrists in Honolulu · All child and adolescent psychiatrists in Hawaii