Gary S Firestein, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

G46824 Issued in CA

Practice address

200 W Arbor Dr
San Diego, CA 92103-9001

Phone

(858) 822-0480

NPI assigned

Jul 12, 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

Rheumatology

Education

Johns Hopkins University School of Medicine, 1980

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Regents of the University of CaliforniaGroup PAC ID 3577476761, 2,047 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• UC San Diego Health Hillcrest - Hillcrest Med Ctr Hospital, San Diego, CA, CCN 050025

Merit-based Incentive Payment System (MIPS)

Final score

90.77 of 100Reported as group

Quality

84.13

Promoting interoperability

100

Improvement activities

40

Cost

73.88

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.

• Regents of the University of California

  • Pain Medicine (Anesthesiology) Physician
  • San Diego, CA
  • NPI 1376646869
  Medicare reassignment Care Compare group NPD
• Regents of the University of California

  • Internal Medicine Physician
  • San Diego, CA
  • NPI 1508968751
  NPD
• Regents of the University of California

  • Diagnostic Radiology Physician
  • San Diego, CA
  • NPI 1558463927
  NPD
• Regents of the University of California Ucsd Head and Neck Surgery

  • Otolaryngology Physician
  • San Diego, CA
  • NPI 1679509962
  NPD (past)

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

• Regents of the University of California

  • General Acute Care Hospital
  • San Diego, CA
  • NPI 1184722779
  Care Compare affiliation

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

{
    "created_epoch": "1152662400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1699790808",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9500 GILMAN DR",
            "address_2": "MAIL CODE 0656",
            "city": "LA JOLLA",
            "state": "CA",
            "postal_code": "920935004",
            "telephone_number": "858-822-0480",
            "fax_number": "858-534-2606"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "200 W ARBOR DR",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921039001",
            "telephone_number": "858-822-0480"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FIRESTEIN",
        "first_name": "GARY",
        "middle_name": "S",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-12",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "G46824",
            "primary": true
        },
        {
            "code": "207RR0500X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Rheumatology",
            "state": "CA",
            "license": "G46824",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00G468240",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• James Patrick Fiorillo
• Jasmine Fiorini
• Yaron Fireizen, M.D
• Emily Fireman, MD
• Catherine Elizabeth Firestein, MD, MPH
• Caroline Grace Firestone
• Michelle Firestone
• Susana Firman
• Nilofar Firooznia, MD
• First Avenue Counseling Centre

• Internal Medicine Physician in San Diego, CA
• Providers in San Diego, CA by specialty
• Internal Medicine 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.
• 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.