Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John N Cheslock, OD

Optometrist in Longview, WA · enumerated 2006.

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

National Provider Identifier

1790873370

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. John N Cheslock

Credential OD

Sex Male

Practice address 950 11th Ave, Longview, WA, 98632

Phone (360) 577-1500

Fax (360) 425-0735

Enumeration date Oct 10, 2006

Last updated in NPPES Dec 20, 2007

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License OD00003763 (WA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
0199625	Other	WA	LABOR & INDUSTRIES
1610999	Other	WA	COMMUNITY HEALTH PLAN
2027092	Medicaid	WA	-
7048CH	Other	WA	REGENCE BLUE CROSS

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 John Cheslock's NPI record?

Cross-check NPI 1790873370 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1790873370 active?

Yes, as of the latest NPPES snapshot, NPI 1790873370 is active (record last updated 2007-12-20).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-20.