DR. PATRICK K SIU M.D.
NPI 1629005475
Internal Medicine in Camarillo, CA

Q: What is Patrick Siu's NPI number?

The NPI number for Patrick Siu is 1629005475. It was assigned to this individual provider in the NPPES registry on June 27, 2006.

Q: What is Patrick Siu'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 Patrick Siu was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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 June 27, 2006

422 ARNEILL RD STE B, CAMARILLO, CA 93010(805) 383-4510(805) 383-4511 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Dr. Patrick K Siu M.d. NPPES

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

DR. PATRICK K SIU M.D. (NPI 1629005475) is an individual internal medicine provider in Camarillo, California, licensed in California (G86731) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1629005475

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. PATRICK K SIUCredential: M.D.

Location Address422 ARNEILL RD STE BCamarillo, CA 93010-6434

Mailing Address2705 Loma Vista Rd, Suite 205Ventura, CA 93003-1581 · (805) 667-2801 · Fax (805) 667-2865

Phone(805) 383-4510

Fax(805) 383-4511

Sole ProprietorNo

Enumeration DateJune 27, 2006

Last NPPES UpdateSeptember 11, 2025

✔ NPI 1629005475 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · G86731

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.

Also ListedEmergency Medicine · Emergency Medical ServicesTaxonomy 207PE0004X · License MD 4738 (HI)

422 ARNEILL RD STE B, Camarillo, CA 93010

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Other Identifiers 7

Medicaid01348502HI

MedicaidRHM08609FCA

OtherD0014375HI · Shield/hmsa

Other050394CA · Blue Cross

MedicaidRHM18553HCA

MedicaidRHM08608FCA

MedicaidZZT40394FCA

Other Providers at the Same Location NPPES 6

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

DR. DEBRA OUYANG MD

Internal Medicine (Endocrinology, Diabetes & Metabolism)