Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Lydia D Contreras

Health Information Technician in San Francisco, CA · enumerated 2011.

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

National Provider Identifier

1881980225

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Registry record

Entity type Individual (Type 1)

Name Lydia D Contreras

Sex Female

Practice address 1153 Oak St, San Francisco, CA, 94117

Phone (415) 431-9000

Fax (415) 431-1813

Enumeration date Jun 23, 2011

Last updated in NPPES Jun 23, 2011

Taxonomy & licenses

247000000X Health Information Technician Technologists, Technicians & Other Technical Service Providers Primary

Other identifiers

Identifier	Type	State	Issuer
94-1164909	Other	CA	NON-PROFIT

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 Lydia Contreras practice?

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

What is the NPI number for Lydia Contreras?

The National Provider Identifier (NPI) for Lydia Contreras is 1881980225, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-23.