Alexander James Geyer, M.D.

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

A154572 Issued in CA

Practice address

21634 Retreat Pkwy
Corona, CA 92883-6100

Phone

(951) 493-6921

Fax

(951) 826-8157

NPI assigned

Apr 10, 2016

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

Family Practice

Education

University of Arizona College of Medicine, 2012

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Riverside Medical Clinic IncGroup PAC ID 2961492327, 173 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• Riverside Medical Clinic, Inc

  • Dermatology Physician
  • Riverside, CA
  • NPI 1720183403
  Medicare reassignment Care Compare group NPD
• Riverside Medical Clinic, Inc

  • Internal Medicine Physician
  • Riverside, CA
  • NPI 1730180415

  Family Medicine

  NPD

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

{
    "created_epoch": "1460246400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1744588800000",
    "number": "1053775684",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "21634 RETREAT PKWY",
            "city": "CORONA",
            "state": "CA",
            "postal_code": "928836100",
            "telephone_number": "951-493-6921",
            "fax_number": "951-826-8157"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "21634 RETREAT PKWY",
            "city": "CORONA",
            "state": "CA",
            "postal_code": "928836100",
            "telephone_number": "951-493-6921",
            "fax_number": "951-826-8157"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "757 Westwood Plz",
            "address_purpose": "LOCATION",
            "city": "Los Angeles",
            "state": "CA",
            "postal_code": "900957419",
            "country_code": "US",
            "telephone_number": "310-319-4711",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GEYER",
        "first_name": "ALEXANDER",
        "middle_name": "JAMES",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2016-04-10",
        "last_updated": "2025-04-14",
        "certification_date": "2025-04-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "A154572",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Marie Therese Georges, FNP
• Ragy S Gergis
• Paul B Gerhardt, PHD
• Yoav Gershon, M.D.
• Brandon Geston
• Ghasan M Tabel MD Inc
• Ramtin Ghavami
• Shima Ghavimi, M.D.
• Rida Ghazaleh
• Sasha Ghazi

• Family Medicine Physician in Corona, CA
• Providers in Corona, 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 Apr 14, 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.