Active NPI
Marsha A Guerrein, MD
- Diagnostic Radiology Physician
- Torrance, CA
National Provider Identifier
1093790206
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Diagnostic Radiology Physician
- License
- A39687
- Practice address
- 410 Torrance Boulevard
Torrance, CA 90503 - Phone
- (310) 540-7676
- NPI assigned
- Dec 9, 2005
- Last updated
- Jul 13, 2026
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| 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
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 00A396870 | Other | CA | MEDI 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
| License | State | Type | Specialty |
|---|---|---|---|
| A39687 | CA | MD | Diagnostic Radiology Physician |
Practice roles
| Organization | Specialty | Status | New 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.
-
- Diagnostic Radiology Physician
- Whittier, CA
- NPI 1609826684
-
dba PLCM Outpatient Imaging Torrance
- Radiology Clinic/Center
- Torrance, CA
- NPI 1265466189
-
- Radiology Clinic/Center
- Long Beach, CA
- NPI 1831173905
-
- Neuroradiology Physician
- Long Beach, CA
- NPI 1710963418
Diagnostic Radiology
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.