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

Dr. Leon Frank Desimone, DDS

General Practice Dentistry in Fallbrook, CA · enumerated 2008 · practices at American Spine PC.

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

National Provider Identifier

1588821045

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Registry record

Entity type Individual (Type 1)

Name Dr. Leon Frank Desimone

Credential DDS

Sex Male

Practice address Fallbrook, CA, 92028

Phone (760) 723-0787

Enumeration date May 21, 2008

Last updated in NPPES May 21, 2008

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 27423 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Leon Desimone practice?

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

What is the NPI number for Leon Desimone?

The National Provider Identifier (NPI) for Leon Desimone is 1588821045, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-21.