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

Dr. Christopher Lyon, PH.D,MD

Ophthalmology Physician in Orange, CA · enumerated 2007.

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

National Provider Identifier

1649316753

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Registry record

Entity type Individual (Type 1)

Name Dr. Christopher Lyon

Credential PH.D,MD

Sex Male

Practice address Orange, CA, 92868

Phone (714) 771-1144

Fax (714) 771-6785

Enumeration date Jan 29, 2007

Last updated in NPPES Oct 24, 2008

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

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License A37277 (CA) Primary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License A37277 (CA) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
330116450	Other	CA	TAXID

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 Christopher Lyon practice?

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

What is the NPI number for Christopher Lyon?

The National Provider Identifier (NPI) for Christopher Lyon is 1649316753, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Roberto Barretto Otolaryngology Physician · Orange, CA NPI 1477552941 Marshall Rowen Diagnostic Radiology Physician · Orange, CA NPI 1497754907 William Adelman Pediatric Adolescent Medicine Physician · Orange, CA NPI 1831191386 Pamela Falk Optometrist · Orange, CA NPI 1811989262 Carla Maria Alcid Pediatric Emergency Medicine (Emergency Medicine) Physician · Orange, CA NPI 1942285507 Ravi Krishnan Neonatal-Perinatal Medicine Physician · Orange, CA NPI 1588640197 Adam Schwarz Pediatric Critical Care Medicine Physician · Orange, CA NPI 1194797951 Paul Liu Pediatric Critical Care Medicine Physician · Orange, CA NPI 1548233018

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-10-24.