Christa Anne Robertson, NP
NPI 1548406515ActiveIndividual· Nurse Practitioner, Psych/Mental Health· Santa Rosa, CA
Nurse Practitioner, Psych/Mental Health (NP) with Siyan Clinical Corporation, practicing in Santa Rosa, California. Their prescriptions cost Medicare Part D more than their services did: $14,337 for 375 claims, against $8,167 paid for services in 2024. Teva Pharmaceuticals USA, Inc. reported $29.45 in payments in 2025, mostly food and beverage. Lists Marian Regional Medical Center as a hospital affiliation.
Overview
| NPI | 1548406515 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP |
| Sole proprietor | No |
| NPI issued | Dec 22, 2008 |
| Last updated in NPPES | Jun 22, 2021 |
| Certified by provider | Jun 22, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Psych/Mental Health Primary | 363LP0808X | NP18306 | CA |
| Nurse Practitioner, Primary Care | 363LP2300X | NP18306 | 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 - Nurse Practitioner (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 11 |
|---|---|
| Services billed | 110 across 5 procedure codes |
| Paid by Medicare | $8,167 |
Part D prescriptions in 2024
| Prescriptions (claims) | 375 · 553 30-day fills |
|---|---|
| Patients | 33 |
| Total drug cost | $14,337 |
| Generic share | 98% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Siyan Clinical CorporationSanta Rosa, CA · 20 clinicians
Hospital affiliation
- Marian Regional Medical CenterSanta Maria, CA
Industry payments (Open Payments)
- 2025$29.45 · 1 payment from 1 company
- 2024$57.41 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Teva Pharmaceuticals USA, Inc. | $29.45 | 1 |
What the 2025 payments were for
- Food and Beverage$29.45 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 36 psychiatric nurse practitioners in Santa Rosa · All psychiatric nurse practitioners in California