Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Louis Nelson, O.D.

Optometrist in Castro Valley, CA · enumerated 2005.

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

National Provider Identifier

1922095082

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Registry record

Entity type Individual (Type 1)

Name Dr. John Louis Nelson

Credential O.D.

Sex Male

Practice address 20211 Patio Dr, Suite 100, Castro Valley, CA, 94546

Phone (510) 881-4401

Fax (510) 881-4423

Enumeration date Oct 4, 2005

Last updated in NPPES Aug 6, 2014

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 4985T (CA) Primary

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

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Frequently asked questions

How do I verify John Nelson's NPI record?

Cross-check NPI 1922095082 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1922095082 active?

Yes, as of the latest NPPES snapshot, NPI 1922095082 is active (record last updated 2014-08-06).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-08-06.