Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregory Taylor Michas, D.O.

Psychiatry Physician in Walnut Creek, CA · enumerated 2014.

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

National Provider Identifier

1285039651

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory Taylor Michas

Credential D.O.

Sex Male

Practice address 3100 Oak Rd Ste 270, Walnut Creek, CA, 94597

Phone (925) 944-9711

Fax (925) 944-9709

Enumeration date Oct 28, 2014

Last updated in NPPES Aug 26, 2021

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License U03533 (FL) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 20A15586 (CA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 Gregory Michas practice?

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

What is the NPI number for Gregory Michas?

The National Provider Identifier (NPI) for Gregory Michas is 1285039651, 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 2021-08-26.