Organization Active NPI

Frontline Healthcare Endocrinology LLC

  • Endocrinology, Diabetes & Metabolism Physician
  • Thousand Oaks, CA
National Provider Identifier
1538055066
Registry record updated Jan 19, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Endocrinology, Diabetes & Metabolism PhysicianTaxonomy code 207RE0101X
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

Updated by the provider on Jan 19, 2026

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

Authorized official

Name
Karen KimNPI 1548231764
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)CodeLicenseStatePrimary
Endocrinology, Diabetes & Metabolism PhysicianGroup: 193400000X SINGLE SPECIALTY GROUP 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

Enrollment IDStateProvider typePAC IDDetails
O20251013001414 CA Part B Supplier - Clinic/Group Practice 2365939568 Receives reassigned benefits from 3 practitioners
Practice locations: Thousand Oaks, CA

National Provider Directory

National Provider Directory
Tax ID family
Frontline Healthcare Endocrinology LLC2 organizations share this tax ID, including this one

Other organizations with this tax ID 1

Organizations that report the same tax identification number in the National Provider Directory.

Practitioners & affiliated clinicians

Practitioners 4

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

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

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.

Verify at the official NPI Registry.