Philip Louis Marjon, M.D.

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

C175032 Issued in CA

Practice address

838 Nordahl Rd Ste 300
San Marcos, CA 92069-3599

Phone

(760) 747-8935

Fax

(760) 466-0078

NPI assigned

Nov 9, 2009

Sex

Male

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Hematology/Oncology

Education

University of New Mexico School of Medicine, 2007

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

California Cancer Associates for Research and Excellence IncGroup PAC ID 8022918937, 64 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Palomar Health Downtown Campus Hospital, Escondido, CA, CCN 050115
• Tri-City Medical Center Hospital, Oceanside, CA, CCN 050128
• Palomar Medical Center Poway Hospital, Poway, CA, CCN 050636
• Scripps Memorial Hospital - Encinitas Hospital, Encinitas, CA, CCN 050503

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as group

Quality

89.27

Promoting interoperability

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

• Direct secure messaging: pmarjon36967@direct.southcoast.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• California Cancer Associates for Research and Excellence Inc

  • Hematology & Oncology Physician
  • Fresno, CA
  • NPI 1083661607

  Multi-Specialty

  Medicare reassignment Care Compare group NPD
• California Cancer Associates for Research and Excellence Inc

  • Hematology & Oncology Physician
  • Fresno, CA
  • NPI 1902359425

  Multi-Specialty

  NPD
• Scripps Health

  • Clinical Medical Laboratory
  • La Jolla, CA
  • NPI 1427034990
  NPD (past)
• Temecula Valley Hospital Inc

  • General Acute Care Hospital
  • Temecula, CA
  • NPI 1679816201
  NPD (past)
• Dana-Farber Cancer Institute, Inc.

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1851333686

  Multi-Specialty

  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Palomar Health

  • General Acute Care Hospital
  • Poway, CA
  • NPI 1376513754
  Care Compare affiliation
• Palomar Health

  • General Acute Care Hospital
  • Escondido, CA
  • NPI 1457321317
  Care Compare affiliation
• Scripps Health

  • General Acute Care Hospital
  • Encinitas, CA
  • NPI 1700829199
  Care Compare affiliation
• Tri-City Hospital

  • General Acute Care Hospital
  • Oceanside, CA
  • NPI 1801861190
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1257724800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1766361600000",
    "number": "1912234121",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "104 WOODMONT BLVD STE 500",
            "city": "NASHVILLE",
            "state": "TN",
            "postal_code": "372052245",
            "telephone_number": "615-783-1066"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "838 NORDAHL RD STE 300",
            "city": "SAN MARCOS",
            "state": "CA",
            "postal_code": "920693599",
            "telephone_number": "760-747-8935",
            "fax_number": "760-466-0078"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "450 4th Ave Ste 311",
            "address_purpose": "LOCATION",
            "city": "Chula Vista",
            "state": "CA",
            "postal_code": "919104429",
            "country_code": "US",
            "telephone_number": "619-371-9156",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "28078 Baxter Rd Ste 140",
            "address_purpose": "LOCATION",
            "city": "Murrieta",
            "state": "CA",
            "postal_code": "925631403",
            "country_code": "US",
            "telephone_number": "760-733-9191",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3965 5th Ave Ste 230",
            "address_purpose": "LOCATION",
            "city": "San Diego",
            "state": "CA",
            "postal_code": "921033107",
            "country_code": "US",
            "telephone_number": "619-872-0953",
            "fax_number": "619-378-3162",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MARJON",
        "first_name": "PHILIP",
        "middle_name": "LOUIS",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2009-11-09",
        "last_updated": "2025-12-22",
        "certification_date": "2025-12-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "CA",
            "license": "C175032",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Hematology & Oncology Physician in San Marcos, CA
• Providers in San Marcos, CA by specialty
• Hematology & Oncology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 22, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.