Active NPI
Frontline Healthcare Endocrinology LLC
- Endocrinology, Diabetes & Metabolism Physician
- Thousand Oaks, CA
National Provider Identifier
1538055066
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Endocrinology, Diabetes & Metabolism Physician
- Legal business name
- FRONTLINE HEALTHCARE ENDOCRINOLOGY LLC
- Practice address
- 555 Marin St Ste 120
Thousand Oaks, CA 91360-4102 - Phone
- (805) 449-1111
- NPI assigned
- Jun 12, 2025
- Organization subpart
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Authorized official
- Name
- Karen Kim
- Title
- MD
- Phone
- (213) 250-9988
Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Endocrinology, Diabetes & Metabolism Physician | 207RE0101X | Primary |
Addresses
Primary practice location
555 Marin St Ste 120
Thousand Oaks, CA 91360-4102
Mailing address
159 E Huntington Dr Ste 9
Arcadia, CA 91006-3225
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in CA
Enrollment records 1
National Provider Directory
National Provider Directory- Tax ID family
- Frontline Healthcare Endocrinology LLC
Other organizations with this tax ID 1
Organizations that report the same tax identification number in the National Provider Directory.
-
- Endocrinology, Diabetes & Metabolism Physician
- Thousand Oaks, CA
- NPI 1598618787
Practitioners & affiliated clinicians
Practitioners 4
Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.
-
- Internal Medicine Physician
- Los Angeles, CA
- NPI 1548231764
-
- Medical Physician Assistant
- Oak View, CA
- NPI 1871374264
-
- Endocrinology, Diabetes & Metabolism Physician
- Inglewood, CA
- NPI 1174634513
-
- Physician Assistant
- Los Angeles, CA
- NPI 1467164178
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1749686400000",
"enumeration_type": "NPI-2",
"last_updated_epoch": "1768780800000",
"number": "1538055066",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "159 E HUNTINGTON DR STE 9",
"city": "ARCADIA",
"state": "CA",
"postal_code": "910063225"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "555 MARIN ST STE 120",
"city": "THOUSAND OAKS",
"state": "CA",
"postal_code": "913604102",
"telephone_number": "805-449-1111"
}
],
"practiceLocations": [],
"basic": {
"organization_name": "FRONTLINE HEALTHCARE ENDOCRINOLOGY LLC",
"organizational_subpart": "NO",
"enumeration_date": "2025-06-12",
"last_updated": "2026-01-19",
"certification_date": "2026-01-19",
"status": "A",
"authorized_official_last_name": "KIM",
"authorized_official_first_name": "KAREN",
"authorized_official_title_or_position": "MD",
"authorized_official_telephone_number": "213-250-9988"
},
"taxonomies": [
{
"code": "207RE0101X",
"taxonomy_group": "193400000X SINGLE SPECIALTY GROUP",
"desc": "Internal Medicine, Endocrinology, Diabetes & Metabolism",
"state": null,
"license": null,
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Thousand Oaks, CA
- Frederic J Leong MD Inc
- Lindsay Mae Frieder, RD
- Paulina Friedl, NONE
- Joel Lloyd Friedman, DO
- Frontline Healthcare 3, Professional Corporation
- Frontline Healthcare-Endocrinology Professional Corporation
- Philip Kent Frykman, M.D.
- Rouxann Tomiko Fujimoto, PHARM.D.
- Full Care Homehealth, Inc
- Full Care Hospice and Palliative Care Inc
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 19, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.