Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jonathan Michael Klunk, OD

Optometrist in Alton, IL · enumerated 2023.

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

National Provider Identifier

1306546916

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Registry record

Entity type Individual (Type 1)

Name Jonathan Michael Klunk

Credential OD

Sex Male

Practice address 1819 Homer Adams Pkwy, Alton, IL, 62002

Phone (618) 208-0585

Fax (618) 208-0586

Enumeration date Mar 3, 2023

Last updated in NPPES Dec 21, 2023

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 046.011750 (IL) 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

How do I verify Jonathan Klunk's NPI record?

Cross-check NPI 1306546916 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1306546916 active?

Yes, as of the latest NPPES snapshot, NPI 1306546916 is active (record last updated 2023-12-21).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-12-21.