Justin Marquis, PA
Physician Assistant · Oceanside, CA
Justin Marquis, PA is a physician assistant with a practice address in Oceanside, California, and NPI 1891729422, issued on Jul 10, 2006. Check the license (California PA16871, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Justin Marquis
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- PA16871 CA
16871 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Mercy Circle, Oceanside, CA 92055
- Phone
- (760) 725-1288
- Enumerated
- Jul 10, 2006
- Record last updated
- Jan 31, 2025
- Medicare enrollment
- Enrolled (PECOS I20110728000173); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 200 Mercy Circle
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Justin Marquis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA16871Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average physician assistant in 2024
46 Medicare Part D claims for 36 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.
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.
Bills Medicare through one group practice
- Graybill Medical Group IncEscondido, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Justin Marquis among 14,451 physician assistant records in California
Justin Marquis, PA is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 87% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2000 · median 2018 among the 7,214 with a school on file
- Record last updated2025 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
49 physician assistant records list a practice address in Oceanside
They are 49 of the 3,438 NPPES records with a practice address in Oceanside, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Oceanside → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Joseph Baugh, PACamp Pendleton, CA 920551154455871
- Brett BolandCamp Pendleton, CA 920551689046047
- Ryan Boudreau, PA-CCamp Pendleton, CA 920551093194284
- Luis Figueroa, PACamp Pendleton, CA 920551134594245
- James Jones, PACamp Pendleton, CA 920551801128012
- Nicholas Jurski, PA-SOceanside, CA 920551528413218
- Melinda Martinez, PACamp Pendleton, CA 920551023157013
- Tiffany Nguyen, PACamp Pendleton, CA 920551790111607
Common questions
What is Justin Marquis, PA's NPI number?
Justin Marquis, PA's National Provider Identifier (NPI) is 1891729422, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Justin Marquis, PA located?
The NPPES record lists a practice address at 200 Mercy Circle, Oceanside, CA, 92055. Phone: (760) 725-1288. Providers update this record themselves, so call before visiting.
How can I verify Justin Marquis, PA's license?
NPPES lists California license number PA16871, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Justin Marquis, PA prescribe under Medicare Part D?
In 2024, Justin Marquis, PA had 46 Medicare Part D claims for 36 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.