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

Dr. Michael David Lenhardt, O.D.

Optometrist in Fullerton, CA · enumerated 2006.

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

National Provider Identifier

1710996228

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael David Lenhardt

Credential O.D.

Sex Male

Practice address Fullerton, CA, 92831

Phone (714) 525-3350

Fax (714) 525-1310

Enumeration date Aug 5, 2006

Last updated in NPPES May 26, 2016

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OPT 13041 TPG (CA) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier	Type	State	Issuer
213323501	Other	CA	ANTHEM BLUE CROSS OF CA
ZZZ67199Y	Other	CA	BLUE SHIELD OF CA

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 Michael Lenhardt?

The National Provider Identifier (NPI) for Michael Lenhardt is 1710996228, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michael Lenhardt practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-05-26.