Tamara O'Nan, PA-C
NPI 1477837862ActiveIndividual· Physician Assistant· Newport Beach, CA
Physician Assistant (PA-C) in Newport Beach, California, licensed in CA, with an NPI issued in October 2011. Part D covered 1,016 prescriptions written in 2024, 93% of them generic. Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) was the largest of 23 companies reporting payments in 2025, $4,881 in all, mostly food and beverage.
Overview
| NPI | 1477837862 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Oct 4, 2011 |
| Last updated in NPPES | Mar 12, 2025 |
| Certified by provider | Mar 12, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA21869 | CA |
| Physician Assistant | 363A00000X | — | — |
| Physician Assistant, Medical | 363AM0700X | PA21869 | CA |
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 - Physician Assistant (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 1,016 · 1,396 30-day fills |
|---|---|
| Patients | 65 |
| Total drug cost | $137,689 |
| Generic share | 93% of claims |
Industry payments (Open Payments)
- 2025$4,881 · 200 payments from 23 companies
- 2024$3,624 · 176 payments from 24 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $607.30 | 29 |
| Vanda Pharmaceuticals Inc. | $581.37 | 17 |
| Neurocrine Biosciences, Inc. | $489.22 | 16 |
| E.R. Squibb & Sons, L.L.C. | $382.14 | 10 |
| Janssen Pharmaceuticals, Inc | $336.94 | 7 |
What the 2025 payments were for
- Food and Beverage$4,881 · 200 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 153 physician assistants in Newport Beach · All physician assistants in California