Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Michael A Gacias, DDS

Dentist in Walnut, CA · enumerated 2024.

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

National Provider Identifier

1871318063

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael A Gacias

Credential DDS

Sex Male

Practice address Walnut, CA, 91789

Phone (909) 263-4105

Enumeration date Nov 21, 2024

Last updated in NPPES Nov 21, 2024

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

122300000X Dentist Dental Providers · License 110831 (CA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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.

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Frequently asked questions

Where does Michael Gacias practice?

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

What is the NPI number for Michael Gacias?

The National Provider Identifier (NPI) for Michael Gacias is 1871318063, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Cristina Gutierrez General Practice Dentistry · Walnut, CA NPI 1669688149

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-21.