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FRONTLINE HEALTHCARE-ENDOCRINOLOGY PROFESSIONAL CORPORATION
NPI 1598618787
Internal Medicine - Endocrinology, Diabetes & Metabolism in Thousand Oaks, CA

Active since February 17, 2026
555 MARIN ST STE 120, THOUSAND OAKS, CA 91360(805) 449-1111 Get Directions Write a Review

NPPES record last updated: May 14, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Frontline Healthcare-endocrinology Professional Corporation NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

FRONTLINE HEALTHCARE-ENDOCRINOLOGY PROFESSIONAL CORPORATION (NPI 1598618787) is a healthcare organization registered as an endocrinology, diabetes & metabolism in Thousand Oaks, California and active in the NPI registry since February 2026. The organization lists Fungwah Chris Ruiz, Administrator, as its authorized official.

NPPES Registry Identity

NPI1598618787
Entity TypeOrganization
Primary Taxonomy207RE0101X
Legal Business NameFRONTLINE HEALTHCARE-ENDOCRINOLOGY PROFESSIONAL CORPORATION
Location Address555 MARIN ST STE 120Thousand Oaks, CA 91360-4102
Mailing Address555 Marin St Ste 120Thousand Oaks, CA 91360-4102 · (805) 449-1111
Phone(805) 449-1111
Organization SubpartNo
Authorized OfficialFungwah Chris RuizAdministrator · (805) 449-1111
Enumeration DateFebruary 17, 2026
Last NPPES UpdateMay 14, 2026
NPPES CertifiedMay 14, 2026
✔ NPI 1598618787 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
555 MARIN ST STE 120, Thousand Oaks, CA 91360
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

FRONTLINE HEALTHCARE ENDOCRINOLOGY LLC
Internal Medicine (Endocrinology, Diabetes & Metabolism)
555 MARIN ST STE 120
THOUSAND OAKS, CA 91360
Ventura County (805) 449-1111

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Frontline Healthcare-Endocrinology Professional Corporation's NPI number?

The NPI number for Frontline Healthcare-Endocrinology Professional Corporation is 1598618787. It was assigned to this organization in the NPPES registry on February 17, 2026.

Where is Frontline Healthcare-Endocrinology Professional Corporation located?

Frontline Healthcare-Endocrinology Professional Corporation is located at 555 Marin St Ste 120, Thousand Oaks, CA 91360. The listed phone number is (805) 449-1111.

What is Frontline Healthcare-Endocrinology Professional Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

When was this NPI record last updated?

The NPPES record for Frontline Healthcare-Endocrinology Professional Corporation was last updated on May 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.