Olivia Marshall, PA
NPI 1639522766 · Physician Assistant · Colton, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Olivia Marshall, PA is a Physician Assistant provider in Colton, CA (NPI 1639522766).
Provider details
- NPI number
- 1639522766
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- No
- License
- 55316 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
26 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 26 | $102 |
Typical Medicare-allowed amounts for these services range $102–$102 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 47 | 21 |
| Tirzepatidebrand: Mounjaro | 17 | — |
| Ondansetronbrand: Ondansetron Odt | 14 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude 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 no Part D record, 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
Additional practice locations (2)
- 3811 E Bell Rd Ste 107Phoenix, AZ 85032-2158Phone: (602) 482-6100
- 6950 E Chauncey LnPhoenix, AZ 85054-5178Phone: (623) 873-8565Fax: (480) 372-2110
Registry dates
- Enumerated
- 2016-07-13
- Last updated
- 2019-04-22
Frequently asked questions
- What is Olivia Marshall's NPI number?
- Olivia Marshall's National Provider Identifier (NPI) is 1639522766, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Olivia Marshall's specialty?
- Olivia Marshall is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Olivia Marshall located?
- Olivia Marshall's practice location on file with NPPES is 900 E Washington St Ste 200, Colton, CA 92324-4192.
- What is Olivia Marshall's phone number?
- The practice phone number listed in the NPPES registry for Olivia Marshall is (909) 882-5867.
- Does Olivia Marshall accept Medicare?
- Olivia Marshall is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Olivia Marshall's NPI active?
- Yes — Olivia Marshall's NPI (1639522766) is active in the NPPES registry as of the last update on 2019-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.