Catherine Koss, M.D.

Primary specialty

Infectious Disease PhysicianTaxonomy code 207RI0200X

License

A115493 Issued in CA

Practice address

UCSF Department of Medicine
505 Parnassus Avenue
San Francisco, CA 94143-0001

Phone

(415) 476-1528

NPI assigned

Oct 8, 2009

Sex

Female

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

Enrolled in CA

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

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• City & County of San Francisco

  • Clinical Medical Laboratory
  • San Francisco, CA
  • NPI 1982737524
  Medicare reassignment NPD
• University of California SFGH Medical Group

  • Hematology (Internal Medicine) Physician
  • San Francisco, CA
  • NPI 1326013442
  Medicare reassignment NPD
• University of California SFGH Medical Group

  • Infectious Disease Physician
  • San Francisco, CA
  • NPI 1366417933
  Medicare reassignment NPD
• City & County of San Francisco

  • Community Health/Public Health Clinical Nurse Specialist
  • San Francisco, CA
  • NPI 1609041060
  NPD
• City and County of San Francisco

  • Methadone Clinic
  • San Francisco, CA
  • NPI 1578787925
  NPD
• University of California SFGH Medical Group

  • Vascular Surgery Physician
  • San Francisco, CA
  • NPI 1033913959
  NPD
• University of California SFGH Medical Group

  • Medical Oncology Physician
  • San Francisco, CA
  • NPI 1386619419
  NPD

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

{
    "created_epoch": "1254960000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1778630400000",
    "number": "1861727950",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "UCSF DEPARTMENT OF MEDICINE",
            "address_2": "505 PARNASSUS AVENUE",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941430001"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "UCSF DEPARTMENT OF MEDICINE",
            "address_2": "505 PARNASSUS AVENUE",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941430001",
            "telephone_number": "415-476-1528"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "995 Potrero Ave.",
            "address_2": "Bldg. 80, Ward 86, Fl. 6",
            "address_purpose": "LOCATION",
            "city": "San Francisco",
            "state": "CA",
            "postal_code": "941103518",
            "country_code": "US",
            "telephone_number": "628-206-2400",
            "fax_number": "628-206-7514",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "KOSS",
        "first_name": "CATHERINE",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2009-10-08",
        "last_updated": "2026-05-13",
        "certification_date": "2026-05-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A115493",
            "primary": false
        },
        {
            "code": "207RI0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Infectious Disease",
            "state": "CA",
            "license": "A115493",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Danny Michael Kosim, MFT
• John Kosim
• Marta V. Kosinski, M.D.
• Naomi Sarah Kosman-Wiener, M.A.
• Robert E. Kosnik, M.D.
• Megan Kossar, L.C.S.W.
• Alena Kossman
• Noele A Kostelic
• Felicitas Koster, D.O.
• Hillary Koster, MS

• Infectious Disease Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Infectious Disease Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 13, 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.