Frank T Grassi M.D.

Primary specialty

Critical Care Medicine (Internal Medicine) PhysicianTaxonomy code 207RC0200X

Legal business name

FRANK T GRASSI M.D.

Practice address

4033 3Rd Ave Ste 300
San Diego, CA 92103-2138

Phone

(619) 299-2570

Fax

(619) 294-2738

NPI assigned

Jan 11, 2007

Organization subpart

No

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

Authorized official

Name

Ms. Melissa Miller

Title

Medical Biller

Phone

(619) 299-2570

Specialties & licenses 2

Addresses

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

{
    "created_epoch": "1168473600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1757548800000",
    "number": "1649320821",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4033 3RD AVE STE 300",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921032138",
            "telephone_number": "619-299-2570",
            "fax_number": "619-294-2738"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4033 3RD AVE STE 300",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921032138",
            "telephone_number": "619-299-2570",
            "fax_number": "619-294-2738"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "FRANK T GRASSI M.D.",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-01-11",
        "last_updated": "2025-09-11",
        "status": "A",
        "authorized_official_last_name": "MILLER",
        "authorized_official_first_name": "MELISSA",
        "authorized_official_title_or_position": "MEDICAL BILLER",
        "authorized_official_telephone_number": "619-299-2570",
        "authorized_official_name_prefix": "Ms."
    },
    "taxonomies": [
        {
            "code": "207RC0200X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": null,
            "license": null,
            "primary": true
        },
        {
            "code": "207RP1001X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Pulmonary Disease",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Phillip Frangie, RRT
• Najeeb Frangool, DMD
• Frank E Rafail DMD Inc
• Frank J. Stella, M.D., a Medical Corp.
• Frank Nezhadian a Professional Corporation
• Bradford Frank, MD
• Eric Clifford Frank
• Ethan D. Frank, MD
• Guido Klaus Wilhelm Frank, M.D.
• Joanna Frank, M.S., BCBA

• Critical Care Medicine (Internal Medicine) Physician in San Diego, CA
• Providers in San Diego, CA by specialty
• Critical Care Medicine (Internal Medicine) Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.