Andrew Royce Armstrong, PA-C, MPAS
Physician Assistant · Oxnard, CA
Andrew Royce Armstrong, PA-C, MPAS is a physician assistant with a practice address in Oxnard, California, and NPI 1306196316, issued on Sep 17, 2012. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Andrew Royce Armstrong
- Credential
- PA-C, MPAS
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 2221 Wankel Way, Oxnard, CA 93030
- Phone
- (805) 988-9366
- Enumerated
- Sep 17, 2012
- Record last updated
- Jul 14, 2025
- Fax
- (805) 483-3747
- Medicare enrollment
- Enrolled (PECOS I20190430000411); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 2221 Wankel Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christian CastellanosPhysician Assistant1346027828
- Kevin Deitel, MDOrthopaedic Surgery of the Spine Physician1033111380
- Deborah Fuqua Cuen, OTR/LOccupational Therapist1366544751
- Mark Ghilarducci, M.D.Sports Medicine (Orthopaedic Surgery) Physician1922063700
- Nicola GrunOccupational Therapist1245760776
- J HirstOrthopedic Physical Therapist1528592995
Verify Andrew Royce Armstrong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average physician assistant in 2024
353 Medicare Part D claims for 130 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 18 claims were for opioids.
Most prescribed
- Meloxicam144 claims
- Celecoxib104 claims
- Prednisone49 claims
- Tramadol Hcl15 claims
- Diclofenac Sodium14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $33.90
2 payments; by number, the most common kind was food and beverage; the largest payer was Endo USA, Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Ventura Orthopedics Medical Group IncOxnard, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
69 physician assistant records list a practice address in Oxnard
They are 69 of the 3,211 NPPES records with a practice address in Oxnard, and 14,451 physician assistant records in California.
All 69 in Oxnard → All 14,451 in California → Every provider in Oxnard →
Other physician assistant records in California
- Marcia -Galbraith, PAStockton, CA1407143274
- Danny Abad, PAOrange, CA1477158673
- Lea Dominique Abadies, PATustin, CA1124754254
- Rea Elizabeth Abaniel, P.A.-CSeal Beach, CA1396173621
- Ramina Abbasi, PA-CSignal Hill, CA1093448300
- Ariel Abbott, PA-CStockton, CA1780334342
- Barrie Abbott, PA-CAnza, CA1861602575
- Elizabeth Abbott, PA-CSan Diego, CA1437540762
- Terri Abbott, P.A.La Jolla, CA1811165566
- Angela Abboud, MMS, PA-CSanta Rosa, CA1114399334
Common questions
What is Andrew Royce Armstrong, PA-C, MPAS's NPI number?
Andrew Royce Armstrong, PA-C, MPAS's National Provider Identifier (NPI) is 1306196316, issued on Sep 17, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Royce Armstrong, PA-C, MPAS located?
The NPPES record lists a practice address at 2221 Wankel Way, Oxnard, CA, 93030. Phone: (805) 988-9366. Providers update this record themselves, so call before visiting.
How can I verify Andrew Royce Armstrong, PA-C, MPAS's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Andrew Royce Armstrong, PA-C, MPAS prescribe under Medicare Part D?
In 2024, Andrew Royce Armstrong, PA-C, MPAS had 353 Medicare Part D claims for 130 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.