Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Justin Marquis, PA

Individual provider Occupational Medicine Physician · NPI 1891729422

Justin Marquis, PA is a Physician Assistant in Oceanside, California. Qualified in 2000, 26 years ago. Practices with Graybill Medical Group Inc, a 104-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
26
Licensed in
CA
In the registry since
2006
Specialties on file
3
What do these letters mean?
PA — Physician Assistant
A licensed clinician who examines, diagnoses and treats under a physician's supervision.

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Practice location Address checks out

200 Mercy Cir
Oceanside, CA 92055-5191
Phone: (760) 725-1288
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 225 East Second Avenue, Escondido, CA 92025-4249 — (760) 291-6700

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence PA16871 (CA)
Occupational Medicine Physician Taxonomy 2083X0100X · Licence 16871 (CA)
Medical Physician Assistant Taxonomy 363AM0700X · Licence 16871 (CA)

Record details

NPI number1891729422
Entity typeIndividual (Type 1)
GenderMale
Credentials PA
Sole proprietorNo
NPI enumeratedJuly 10, 2006
Last updated in NPPESJanuary 31, 2025
Certification dateJanuary 31, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Group practice Graybill Medical Group Inc — 104 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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