James P Grenert, MD

Primary specialty

Anatomic Pathology PhysicianTaxonomy code 207ZP0101X

License

A78348 Issued in CA

Practice address

505 Parnassus Ave
San Francisco, CA 94143-2204

Phone

(415) 353-1613

Fax

(415) 353-1916

NPI assigned

May 6, 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

Other identifiers 1

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

Specialty

Pathology

Education

Mayo Medical School, 2000

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

University of California SFGH Medical GroupGroup PAC ID 5496668410, 566 clinicians

University of California San FranciscoGroup PAC ID 4486567229, 1,780 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Zuckerberg San Francisco General Hosp & Trauma Ctr Hospital, San Francisco, CA, CCN 050228
• UCSF Medical Center Hospital, San Francisco, CA, CCN 050454

Merit-based Incentive Payment System (MIPS)

Final score

84.89 of 100Reported as group

Quality

81.13

Improvement activities

40

Cost

71.5

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jgrenert15418@direct-ucsfmedicalcenter.org

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.

• University of California San Francisco

  • Pediatrics Physician
  • San Francisco, CA
  • NPI 1861578973
  Medicare reassignment Care Compare group NPD
• University of California SFGH Medical Group

  • Otolaryngology Physician
  • San Francisco, CA
  • NPI 1154396208
  Medicare reassignment Care Compare group NPD
• University of California SFGH Medical Group

  • Anesthesiology Physician
  • San Francisco, CA
  • NPI 1366417420
  Medicare reassignment
• 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 1356696215
  NPD
• University of California SFGH Medical Group

  • Oral and Maxillofacial Surgery (Dentist)
  • San Francisco, CA
  • NPI 1811475759
  NPD
• UCSF Medical Group Business Services

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1477624104
  NPD (past)
• University of California San Francisco Medical Center

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1144325440
  NPD (past)
• University of California San Francisco Medical Center

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1184728701
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• City & County of San Francisco

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1083648810
  Care Compare affiliation
• City & County of San Francisco

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1164609962
  Care Compare affiliation
• University of California, San Francisco

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1689772592
  Care Compare affiliation

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

{
    "created_epoch": "1146873600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765238400000",
    "number": "1174572390",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1635 DIVISADERO ST STE 625",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941153045",
            "telephone_number": "415-476-4029",
            "fax_number": "415-476-4150"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "505 PARNASSUS AVE",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941432204",
            "telephone_number": "415-353-1613",
            "fax_number": "415-353-1916"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1001 Potrero Ave. Bldg. 3, #201",
            "address_purpose": "LOCATION",
            "city": "San Francisco",
            "state": "CA",
            "postal_code": "941103518",
            "country_code": "US",
            "telephone_number": "628-206-8230",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GRENERT",
        "first_name": "JAMES",
        "middle_name": "P",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-06",
        "last_updated": "2025-12-09",
        "certification_date": "2025-12-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207ZP0102X",
            "taxonomy_group": "",
            "desc": "Pathology, Anatomic Pathology & Clinical Pathology",
            "state": "CA",
            "license": "A78348",
            "primary": false
        },
        {
            "code": "207ZP0101X",
            "taxonomy_group": "",
            "desc": "Pathology, Anatomic Pathology",
            "state": "CA",
            "license": "A78348",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A783480",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Ainsley Gregson
• Laura A Greicus, RN, RNP
• Karin Maria Greier, PT
• Luciano Custo Greig
• Lyndon Gremillion, AUD
• Elise Grenier, M.D.
• Joseph Grenn, D.M.D.
• Marlene Grenon, M.D.
• Valeria Gress
• Sydney Gressel

• Anatomic Pathology Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Anatomic Pathology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 9, 2025; 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.