Brian Nicholas Mason, DO

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

20A23853 Issued in CA

Practice address

1245 16TH St Ste 125
Santa Monica, CA 90404-1240

Phone

(310) 315-8900

Fax

(310) 315-8902

NPI assigned

Apr 5, 2021

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in TN, CA2 enrollments

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 2

Specialty

Family Practice

Education

Other, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Hospitalist Group of Montebello IncGroup PAC ID 2264715143, 55 clinicians

Im-FSR IncGroup PAC ID 6901035138, 28 clinicians

Southeastern Physician Services PCGroup PAC ID 0042307852, 591 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Memorial Hospital of Gardena Hospital, Gardena, CA, CCN 050468
• Community Hospital of Huntington Park Hospital, Huntington Park, CA, CCN 050091
• East Los Angeles Doctors Hospital Hospital, Los Angeles, CA, CCN 050641

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

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.

• Hospitalist Group of Montebello Inc

  • Hospitalist Physician
  • Corona, CA
  • NPI 1578959318
  Medicare reassignment Care Compare group NPD
• Im-FSR Inc.

  • Hospitalist Physician
  • Chino Hills, CA
  • NPI 1154742229
  Medicare reassignment Care Compare group NPD
• Southeastern Physician Services PC

  • Hospitalist Physician
  • Oak Ridge, TN
  • NPI 1083835441

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• The Regents of the University of California

  • Internal Medicine Physician
  • Los Angeles, CA
  • NPI 1235107566
  Medicare reassignment

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

• CHHP Holdings II, LLC

  • General Acute Care Hospital
  • Huntington Park, CA
  • NPI 1891059127
  Care Compare affiliation
• East la Doctors Hospital LP

  • Skilled Nursing Facility
  • Los Angeles, CA
  • NPI 1841477973

  Hospital

  Care Compare affiliation
• Eladh, LP

  • General Acute Care Hospital
  • Los Angeles, CA
  • NPI 1417957473
  Care Compare affiliation
• Eladh, LP

  • Skilled Nursing Facility
  • Los Angeles, CA
  • NPI 1720298326

  Hospital

  Care Compare affiliation
• Gardena Hospital LP

  • General Acute Care Hospital
  • Gardena, CA
  • NPI 1063412005
  Care Compare affiliation

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

{
    "created_epoch": "1617580800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1780358400000",
    "number": "1942889217",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5767 W CENTURY BLVD STE 400",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900455631"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1245 16TH ST STE 125",
            "city": "SANTA MONICA",
            "state": "CA",
            "postal_code": "904041240",
            "telephone_number": "310-315-8900",
            "fax_number": "310-315-8902"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MASON",
        "first_name": "BRIAN",
        "middle_name": "NICHOLAS",
        "name_prefix": "Dr.",
        "credential": "DO",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2021-04-05",
        "last_updated": "2026-06-02",
        "certification_date": "2026-06-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "20A23853",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "20A23853",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Mary McGregor Physical Therapy P C
• Mary Trumpi Chiropractic, Inc
• Hera Maryam
• Nima Mashkouri, D.M.D.
• Katelyn Masiuk, MD PHD
• Bonnie Lynn Mass, PH.D.
• Ralph A Massey, MD
• Alix Esther Masters
• Brittany Masters, MSN, NP
• Christie Lynn Masters, MD, MBA, MHA

• Family Medicine Physician in Santa Monica, CA
• Providers in Santa Monica, CA by specialty
• Family Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 2, 2026; 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.