Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Catherine A. Trejo, MD

Internal Medicine Physician in Mountain View, CA · enumerated 2006.

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

National Provider Identifier

1144307075

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Registry record

Entity type Individual (Type 1)

Name Catherine A. Trejo

Credential MD

Sex Female

Practice address 2127 Sunnyview Ln, Mountain View, CA, 94040

Phone (650) 965-2515

Enumeration date Oct 31, 2006

Last updated in NPPES Feb 5, 2009

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G45249 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
00G452490	Medicaid	CA	-

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

Where does Catherine Trejo practice?

The practice location on file with NPPES is in Mountain View, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Catherine Trejo?

The National Provider Identifier (NPI) for Catherine Trejo is 1144307075, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-02-05.