Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

John L Nelson

Q: What is the NPI number for John L Nelson?

The NPI for John L Nelson is 1487789327, a Type 2 (organization) record in the CMS NPPES registry.

Optometrist in Castro Valley, CA · enumerated 2007 · authorized official John Nelson, Owner.

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

National Provider Identifier

1487789327

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Registry record

Entity type Organization (Type 2)

Legal business name John L Nelson

Other name <Unavail>

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

Phone (510) 881-4401

Fax (510) 881-4423

Enumeration date Feb 22, 2007

Last updated in NPPES Jun 23, 2008

Taxonomy & classification

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

Authorized official

Name John Nelson

Title Owner

Phone (510) 881-4401

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

Who is the authorized official for John L Nelson?

NPPES lists John Nelson (Owner) as the authorized official for this organization.

What is the NPI number for John L Nelson?

The NPI for John L Nelson is 1487789327, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-23.