Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Peter A. Castillo, MD, Inc.

Gynecology Physician in Los Gatos, CA · enumerated 2014 · authorized official Peter Castillo, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1356766869

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Registry record

Entity type Organization (Type 2)

Legal business name Peter A. Castillo, MD, Inc.

Practice address 16070 Matilija Dr, Los Gatos, CA, 95030

Phone (415) 764-4800

Fax (415) 764-4802

Enumeration date Feb 20, 2014

Last updated in NPPES Feb 20, 2014

Taxonomy & classification

207VG0400X Gynecology Physician Allopathic & Osteopathic Physicians · License 109681 (CA) Primary

Authorized official

Name Peter Castillo

Title President

Phone (415) 764-4800

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2014-02-20. Verify at npiregistry.cms.hhs.gov.

Where is Peter A. Castillo, MD, Inc. located?

The practice location on file with NPPES is in Los Gatos, CA.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-02-20.