Steven G Gwiazdowski, MD

Primary specialty

Neonatal-Perinatal Medicine PhysicianTaxonomy code 2080N0001X

License

G683240 Issued in CA

Practice address

1860 Pennsylvania Ave Ste 145
Fairfield, CA 94533-3547

Phone

(707) 646-4051

Fax

(707) 646-5323

NPI assigned

Jan 11, 2007

Sex

Male

Sole proprietor

No

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

Pediatric Medicine

Education

Virginia Commonwealth University, School of Medicine, 1985

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: sgwiazdowski223595@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.

• UCSF Medical Group Business Services

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1477624104
  Medicare reassignment NPD
• UCSF Pediatrics Associates

  • Pediatrics Physician
  • San Francisco, CA
  • NPI 1376614016

  Neonatal-Perinatal Medicine

  Medicare reassignment NPD
• University of California San Francisco

  • Pediatrics Physician
  • San Francisco, CA
  • NPI 1861578973
  Medicare reassignment NPD
• Northbay Neonatology Associates, Inc

  • Neonatal-Perinatal Medicine Physician
  • Vallejo, CA
  • NPI 1265513360
  NPD
• UCSF Medical Group Business Services

  • Health Service Clinic/Center
  • San Francisco, CA
  • NPI 1194115246
  NPD
• University of California San Francisco

  • Surgery Physician
  • San Francisco, CA
  • NPI 1346329380
  NPD
• University of California San Francisco

  • Community/Retail Pharmacy
  • San Francisco, CA
  • NPI 1659141711
  NPD
• University of California San Francisco Medical Center

  • General Acute Care Hospital
  • San Francisco, CA
  • NPI 1144325440
  NPD (past)

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

{
    "created_epoch": "1168473600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1758240000000",
    "number": "1710037684",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1860 PENNSYLVANIA AVE STE 145",
            "city": "FAIRFIELD",
            "state": "CA",
            "postal_code": "945333547",
            "telephone_number": "707-429-6908",
            "fax_number": "707-429-6906"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1860 PENNSYLVANIA AVE STE 145",
            "city": "FAIRFIELD",
            "state": "CA",
            "postal_code": "945333547",
            "telephone_number": "707-646-4051",
            "fax_number": "707-646-5323"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "300 Hospital Dr",
            "address_purpose": "LOCATION",
            "city": "Vallejo",
            "state": "CA",
            "postal_code": "945892574",
            "country_code": "US",
            "telephone_number": "707-554-5102",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GWIAZDOWSKI",
        "first_name": "STEVEN",
        "middle_name": "G",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-01-11",
        "last_updated": "2025-09-19",
        "certification_date": "2025-09-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2080N0001X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Neonatal-Perinatal Medicine",
            "state": "CA",
            "license": "G683240",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "GR0040030",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Svetlana T Gutierrez, M.D.
• Yanely Gutierrez
• Samantha Luanne Guy, PA
• Zairy Guzman Parra
• Jahayra Guzman Silva
• Hana L Ha
• Lawrence Joseph Haas, LCSW
• Mathyas Luis Habte-Michael
• Michelle Marie Hackett, LMFT
• Farah Haddadin

• Neonatal-Perinatal Medicine Physician in Fairfield, CA
• Providers in Fairfield, CA by specialty
• Neonatal-Perinatal Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 19, 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.