Ruth Nyamoita Volkenant, PA
NPI 1174277842ActiveIndividual· Physician Assistant· Santa Rosa, CA
Physician Assistant (PA) with Geriatric Support Medical Group PC, practicing in Santa Rosa, California. 201 Medicare patients in 2024, $266,535 paid; nearly all of their 611 Part D prescriptions were generic (90%). Smith+nephew, Inc. reported $26.43 in payments in 2025, mostly food and beverage. Lists Marinhealth Medical Center as a hospital affiliation.
Overview
| NPI | 1174277842 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | Yes |
| NPI issued | Feb 10, 2022 |
| Last updated in NPPES | Jun 13, 2022 |
| Certified by provider | Jun 13, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 60406 | 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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 201 |
|---|---|
| Services billed | 1,843 across 24 procedure codes |
| Paid by Medicare | $266,535 |
Part D prescriptions in 2024
| Prescriptions (claims) | 611 · 660 30-day fills |
|---|---|
| Patients | 64 |
| Total drug cost | $41,911 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Geriatric Support Medical Group PCEl Segundo, CA · 38 clinicians
Hospital affiliation
- Marinhealth Medical CenterGreenbrae, CA
Other facilities
- Accentcare Home Health of California, IncHome health agency · San Ramon, CA
- Bridge Home HealthHome health agency · Petaluma, CA
- Sutter Care at HomeHome health agency · Novato, CA
- Sutter Care at HomeHome health agency · Santa Rosa, CA
Industry payments (Open Payments)
- 2025$26.43 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Smith+nephew, Inc. | $26.43 | 1 |
What the 2025 payments were for
- Food and Beverage$26.43 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 59 physician assistants in Santa Rosa · All physician assistants in California