Matthew Scott Howlett, MD

Primary specialty

Vascular & Interventional Radiology PhysicianTaxonomy code 2085R0204X

License

2087584 Issued in CA

Practice address

400 Parnassus Ave
San Francisco, CA 94143-2202

Phone

(415) 476-1000

NPI assigned

Mar 18, 2024

Sex

Male

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

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Medicine

State licenses

Interoperability endpoints

• Direct secure messaging: matthew.howlett@hca5.eclinicaldirectplus.com

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

{
    "created_epoch": "1710720000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755129600000",
    "number": "1649039066",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2130 POST ST APT 311",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941153560",
            "telephone_number": "916-293-1903"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "400 PARNASSUS AVE",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941432202",
            "telephone_number": "415-476-1000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HOWLETT",
        "first_name": "MATTHEW",
        "middle_name": "SCOTT",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2024-03-18",
        "last_updated": "2025-08-14",
        "certification_date": "2025-08-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0204X",
            "taxonomy_group": "",
            "desc": "Radiology, Vascular & Interventional Radiology",
            "state": "CA",
            "license": "2087584",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Maria Vallejo Hower
• Stephen James Howey, MBCHB, FRCA, BSC
• Anna E Howland, MFT
• Catherine Elizabeth Howland, M.A.
• Jenna Howlett, MSW, LCSWA, LCASA
• Joan E. Howley, M.D.
• John J. Howse, MD
• Morgan C. Howson, MA, LMFT
• Mary Ann Magdadaro Hoy, RN-BSN
• Arthur Christian Hoye

• Vascular & Interventional Radiology Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Vascular & Interventional Radiology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 14, 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.