Alix Esther Masters

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

A208082 Issued in CA

Practice address

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

Phone

(310) 315-8900

NPI assigned

Mar 27, 2023

Sex

Female

Sole proprietor

No

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

Not listed in the public Medicare enrollment file

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.

Specialty

Internal Medicine

Education

Other, 2023

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

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

{
    "created_epoch": "1679875200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787529600000",
    "number": "1316641202",
    "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",
            "telephone_number": "310-301-8707"
        },
        {
            "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"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MASTERS",
        "first_name": "ALIX",
        "middle_name": "ESTHER",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2023-03-27",
        "last_updated": "2026-08-24",
        "certification_date": "2026-08-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A208082",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Nima Mashkouri, D.M.D.
• Katelyn Masiuk, MD PHD
• Brian Nicholas Mason, DO
• Bonnie Lynn Mass, PH.D.
• Ralph A Massey, MD
• Brittany Masters, MSN, NP
• Christie Lynn Masters, MD, MBA, MHA
• Lisa M Masterson, MD
• Mary Jo Mastro, LCSW
• Fernando Mata, D.C.

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 24, 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.