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

Dr. Philip Louis Marjon, MD

Individual provider Hematology & Oncology Physician · NPI 1912234121

Dr. Philip Louis Marjon, MD is a Hematology/Oncology in San Marcos, California. Graduated from University of New Mexico School of Medicine in 2007, 19 years ago. Practices with California Cancer Associates for Research and Excellence Inc, a 65-clinician group, works from 4 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
19
Trained at
University of New Mexico School of Medicine
Licensed in
CA
In the registry since
2009
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

838 Nordahl Rd Ste 300
San Marcos, CA 92069-3599
Phone: (760) 747-8935
Fax: (760) 466-0078
Show map & directions

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

Additional practice locations (3)

  • 450 4th Ave Ste 311, Chula Vista, CA 91910-4429 — (619) 371-9156
  • 28078 Baxter Rd Ste 140, Murrieta, CA 92563-1403 — (760) 733-9191
  • 3965 5th Ave Ste 230, San Diego, CA 92103-3107 — (619) 872-0953

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence C175032 (CA)

Record details

NPI number1912234121
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 9, 2009
Last updated in NPPESDecember 22, 2025
Certification dateDecember 22, 2025

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolUNIVERSITY OF NEW MEXICO SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice California Cancer Associates For Research And Excellence Inc — 65 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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