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

Dr. John Michael Leary, M.D.

Q: What is the NPI number for John Leary?

The National Provider Identifier (NPI) for John Leary is 1891889606, a Type 1 (individual) record in the CMS NPPES registry.

Specialist in Newport Beach, CA · enumerated 2006.

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

National Provider Identifier

1891889606

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Registry record

Entity type Individual (Type 1)

Name Dr. John Michael Leary

Credential M.D.

Sex Male

Practice address Newport Beach, CA, 92660

Phone (949) 515-9377

Fax (949) 515-9378

Enumeration date Oct 3, 2006

Last updated in NPPES Sep 11, 2025

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

Taxonomy & licenses

174400000X Specialist Other Service Providers · License A36215 (CA) Primary

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

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for John Leary?

The National Provider Identifier (NPI) for John Leary is 1891889606, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Leary practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.