James David Marks, MD

Primary specialty

Critical Care Medicine (Anesthesiology) PhysicianTaxonomy code 207LC0200X

License

G43710 Issued in CA

Practice address

1001 Potrero Ave
RM 3C34
San Francisco, CA 94110-3518

Phone

(415) 206-8934

Fax

(415) 206-3101

NPI assigned

May 3, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1146614400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1801854104",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7464",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941207464",
            "telephone_number": "415-206-3103",
            "fax_number": "415-206-3101"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1001 POTRERO AVE",
            "address_2": "RM 3C34",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941103518",
            "telephone_number": "415-206-8934",
            "fax_number": "415-206-3101"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MARKS",
        "first_name": "JAMES",
        "middle_name": "DAVID",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-03",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "CA",
            "license": "G43710",
            "primary": false
        },
        {
            "code": "207LC0200X",
            "taxonomy_group": "",
            "desc": "Anesthesiology, Critical Care Medicine",
            "state": "CA",
            "license": "G43710",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "G43710",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G437100",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Ioanna M Markolefas
• Karol J Markowitz, LMFT
• Abigail Levinson Marks, PH.D.
• Allan Steven Marks, M.D.
• Catherine Marks, RD
• Judith Marks
• Melody Sue Marks, MFCC
• Nancy Wolberg Marks, M.D.
• Rachel Marks
• Susan Cadinha Marks, MD

• Critical Care Medicine (Anesthesiology) Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Critical Care Medicine (Anesthesiology) 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.