Mark E Claycomb, LCSW

Primary specialty

PsychologistTaxonomy code 103T00000X

License

LCS135532 Issued in CA

Practice address

55 New Montgomery St
#420
San Francisco, CA 94105

Phone

(415) 522-7400

Fax

(445) 543-1932

NPI assigned

Jul 31, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

State licenses

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

{
    "created_epoch": "1154304000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1790791796",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "55 NEW MONTGOMERY ST",
            "address_2": "#420",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "94105",
            "telephone_number": "415-522-7400",
            "fax_number": "445-543-1932"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "55 NEW MONTGOMERY ST",
            "address_2": "#420",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "94105",
            "telephone_number": "415-522-7400",
            "fax_number": "445-543-1932"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CLAYCOMB",
        "first_name": "MARK",
        "middle_name": "E",
        "credential": "LCSW",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-31",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "CA",
            "license": "LCS135532",
            "primary": true
        },
        {
            "code": "104100000X",
            "taxonomy_group": "",
            "desc": "Social Worker",
            "state": "CA",
            "license": "LCS13553",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Grant Clay
• Manika L Clay
• Reuben A Clay Jr., MD
• Rickey Edward Clay, LVN
• Tia Clay, MD
• Alyse Michele Clayman, ASW
• Katherine Claypoole McKenzie, M.S.
• Clayson Longview Health
• Darby Annette Clayson, MD
• Lauren Clayton

• Psychologist in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Psychologist 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.