James Carnahan, PA
NPI 1679621569 · Physician Assistant · Riverside, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Carnahan, PA is a Physician Assistant provider in Riverside, CA (NPI 1679621569).
Provider details
- NPI number
- 1679621569
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Male
- Sole proprietor
- No
- License
- PA13729 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 503 | 494 |
| Oxycodone Hcl | 468 | 460 |
| Naloxone Hcl | 404 | 390 |
| Meloxicam | 329 | 322 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 33 | 33 |
| Alendronate Sodium | 19 | 19 |
| Cefadroxil | 17 | 17 |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-08
- Last updated
- 2021-11-30
Frequently asked questions
- What is James Carnahan's NPI number?
- James Carnahan's National Provider Identifier (NPI) is 1679621569, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Carnahan's specialty?
- James Carnahan is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is James Carnahan located?
- James Carnahan's practice location on file with NPPES is 10800 Magnolia Ave, Riverside, CA 92505-3043.
- What is James Carnahan's phone number?
- The practice phone number listed in the NPPES registry for James Carnahan is (909) 353-2000.
- Does James Carnahan accept Medicare?
- James Carnahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Carnahan's NPI active?
- Yes — James Carnahan's NPI (1679621569) is active in the NPPES registry as of the last update on 2021-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.