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

Dr. Ronald F Janda, OD

Q: What is the NPI number for Ronald Janda?

The National Provider Identifier (NPI) for Ronald Janda is 1003843087, a Type 1 (individual) record in the CMS NPPES registry.

Optometrist in Modesto, CA · enumerated 2006.

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

National Provider Identifier

1003843087

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Registry record

Entity type Individual (Type 1)

Name Dr. Ronald F Janda

Credential OD

Sex Male

Practice address Modesto, CA, 95350

Phone (209) 575-2020

Fax (209) 758-5693

Enumeration date Jun 27, 2006

Last updated in NPPES Feb 14, 2013

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 OPT8748T (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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Ronald Janda practice?

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

What is the NPI number for Ronald Janda?

The National Provider Identifier (NPI) for Ronald Janda is 1003843087, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-02-14.