Cassandra Lai Mellinger

Primary specialty

Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X

License

20A25423 Issued in CA

Practice address

12677 Alcosta Blvd Ste 220
San Ramon, CA 94583-4413

Phone

(925) 254-9840

NPI assigned

Mar 24, 2022

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

Enrolled in NV

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

Medicare enrollment (NPD)

Enrolled

Practice roles

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.

• John Muir Physician Network

  • General Practice Physician
  • Walnut Creek, CA
  • NPI 1841407665
  NPD (past)

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

{
    "created_epoch": "1648080000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785974400000",
    "number": "1811647803",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1450 TREAT BLVD STE 300",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945972168",
            "telephone_number": "925-952-2828"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "12677 ALCOSTA BLVD STE 220",
            "city": "SAN RAMON",
            "state": "CA",
            "postal_code": "945834413",
            "telephone_number": "925-254-9840"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MELLINGER",
        "first_name": "CASSANDRA",
        "middle_name": "LAI",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2022-03-24",
        "last_updated": "2026-08-06",
        "certification_date": "2026-08-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "CA",
            "license": "20A25423",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Rosemarie Melena
• Rosemary Melena
• Christine Ann Melendres, LCSW
• Laura Melgosa, M.S. & LMFT
• Sevan Melkumyan
• Jaime Melvin
• Diane Marie Memory, MFT
• Bonnie Yaw Mende, LMFT
• Lizzete Mendez
• Victoria Isabel Mendez

• Obstetrics & Gynecology Physician in San Ramon, CA
• Providers in San Ramon, CA by specialty
• Obstetrics & Gynecology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 6, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.