Gregory John Martin, MD

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

A52803 Issued in CA

Practice address

45 Castro St
San Francisco, CA 94114-1010

Phone

(415) 600-6000

NPI assigned

Jul 17, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

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

Family Practice

Education

Other, 1983

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Pacific Inpatient Medical GroupGroup PAC ID 6608956966, 128 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• California Pacific Medical Ctr-Davies Campus Hosp Hospital, San Francisco, CA, CCN 050008
• California Pacific Medical Center - Mission Bernal Hospital, San Francisco, CA, CCN 050055
• California Pacific Medical Center- Van Ness Campus Hospital, San Francisco, CA, CCN 050047

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as group

Quality

90

Promoting interoperability

100

Improvement activities

40

Cost

78.43

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: gmartin37757@hisp.ehr.sutterhealth.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.

• Pacific Inpatient Medical Group

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1447447248
  Medicare reassignment Care Compare group NPD
• Alta Bates Summit Medical Center

  dba Merritt Peralta Insititute

  • Substance Use Disorder Rehabilitation Hospital Unit
  • Oakland, CA
  • NPI 1043358542
  NPD (past)
• Javier Amusierra MD Inc

  • Specialist
  • Reedley, CA
  • NPI 1124322763
  NPD (past)
• Sutter East Bay Medical Foundation

  • Clinical Medical Laboratory
  • Berkeley, CA
  • NPI 1831381623
  NPD (past)
• Sutter East Bay Medical Foundation

  • Family Medicine Physician
  • Orinda, CA
  • NPI 1871538769
  NPD (past)
• Javier Amu,M.D. Professional Corporation

  • Specialist
  • NPI 1346491651
  NPD (past)

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

• Sutter Bay Hospitals

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1659439834
  Care Compare affiliation
• Sutter Bay Hospitals

  dba California Pacific Medical Center - Mission Bernal Campus

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1730238007
  Care Compare affiliation
• Sutter Bay Hospitals

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1740348929
  Care Compare affiliation

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

{
    "created_epoch": "1153094400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784764800000",
    "number": "1619995867",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "601 VAN NESS AVE STE E3619",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941023200",
            "telephone_number": "415-531-9047",
            "fax_number": "415-213-4659"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "45 CASTRO ST",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941141010",
            "telephone_number": "415-600-6000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MARTIN",
        "first_name": "GREGORY",
        "middle_name": "JOHN",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-07-17",
        "last_updated": "2026-07-23",
        "certification_date": "2026-07-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "A52803",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A528030",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Douglas James Martin, MD
• Elaine Martin, RN
• Emily Kaitlin Martin, MD
• Emma Lee Martin
• Eva Martin
• Holly Henderson Martin, M.D.
• Ingeborg Martin, M.A.
• Jamie Cherene Martin, NP
• Jan Francis Martin
• Jeffrey N Martin, M.D.

• Family Medicine Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Family Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 23, 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.
• 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.