CURTIS SIU MD INC
NPI 1316880586
Internal Medicine in Laguna Hills, CA

Q: What is Curtis Siu MD Inc's NPI number?

The NPI number for Curtis Siu MD Inc is 1316880586. It was assigned to this organization in the NPPES registry on April 13, 2026.

Q: What is Curtis Siu MD Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Curtis Siu MD Inc was last updated on May 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.

Active since April 13, 2026

23521 PASEO DE VALENCIA STE 108, LAGUNA HILLS, CA 92653(949) 588-7262(949) 588-2167 Get Directions Write a Review

NPPES record last updated: May 1, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: May 1, 2026, Apr 13, 2026 (2 updates tracked since 2026).

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About Curtis Siu Md Inc NPPES

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

CURTIS SIU MD INC (NPI 1316880586) is a healthcare organization registered as an internal medicine in Laguna Hills, California and active in the NPI registry since April 2026. The organization lists Curtis Siu, President, as its authorized official.

NPPES Registry Identity

NPI1316880586

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameCURTIS SIU MD INC

Location Address23521 PASEO DE VALENCIA STE 108Laguna Hills, CA 92653-3137

Mailing Address23521 Paseo De Valencia Ste 108Laguna Hills, CA 92653-3137 · (949) 872-5227 · Fax (949) 588-2167

Phone(949) 588-7262

Fax(949) 588-2167

Organization SubpartNo

Authorized OfficialCurtis SiuPresident · (949) 872-5227

Enumeration DateApril 13, 2026

Last NPPES UpdateMay 1, 20262 updates tracked since enumeration

NPPES CertifiedMay 1, 2026

✔ NPI 1316880586 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

23521 PASEO DE VALENCIA STE 108, Laguna Hills, CA 92653

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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 10

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

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