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

Mr. Ronald Francis Lewis, R.D.O.

Q: What is the NPI number for Ronald Lewis?

The National Provider Identifier (NPI) for Ronald Lewis is 1447472162, a Type 1 (individual) record in the CMS NPPES registry.

Optician in Stockton, CA · enumerated 2007.

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

National Provider Identifier

1447472162

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Registry record

Entity type Individual (Type 1)

Name Mr. Ronald Francis Lewis

Credential R.D.O.

Sex Male

Practice address Stockton, CA, 95204

Phone (209) 464-0669

Fax (209) 460-1878

Enumeration date May 3, 2007

Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

156FX1800X Optician Eye and Vision Services Providers · License SL1731 (CA) Primary

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 Ronald Lewis?

The National Provider Identifier (NPI) for Ronald Lewis is 1447472162, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ronald Lewis practice?

The practice location on file with NPPES is in Stockton, 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 2007-07-08.