Individual provider Active NPI

Marsha A Guerrein, MD

  • Diagnostic Radiology Physician
  • Torrance, CA
National Provider Identifier
1093790206
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Diagnostic Radiology PhysicianTaxonomy code 2085R0202X
License
A39687 Issued in CA
Practice address
410 Torrance Boulevard
Torrance, CA 90503
Phone
(310) 540-7676
NPI assigned
Dec 9, 2005
Last updated
Jul 13, 2026By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Diagnostic Radiology Physician 2085R0202X A39687 CA Primary

Addresses

Primary practice location

410 Torrance Boulevard
Torrance, CA 90503

Mailing address

100 Oceangate
Suite 1000
Long Beach, CA 90802-4312
Phone (562) 590-7400

Other identifiers 1

IdentifierTypeStateIssuer
00A396870OtherCAMEDI CAL

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
A39687CAMDDiagnostic Radiology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Little Company of Mary Ancillary Services Corporation Past Accepting new patients
Lambert Radiology Medical Group, Inc Diagnostic Radiology Past Accepting new patients
Rad-Image Medical Group Inc Diagnostic Radiology Past Accepting new patients
Memrad Medical Group Inc Past Accepting new patients

Organizations & group practices 4

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

NPI Registry JSON

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

{
    "created_epoch": "1134086400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1093790206",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "100 OCEANGATE",
            "address_2": "SUITE 1000",
            "city": "LONG BEACH",
            "state": "CA",
            "postal_code": "908024312",
            "telephone_number": "562-590-7400",
            "fax_number": "562-590-7452"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "410 TORRANCE BOULEVARD",
            "city": "TORRANCE",
            "state": "CA",
            "postal_code": "90503",
            "telephone_number": "310-540-7676"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GUERREIN",
        "first_name": "MARSHA",
        "middle_name": "A",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2005-12-09",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "CA",
            "license": "A39687",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MEDI CAL",
            "identifier": "00A396870",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Torrance, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.