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

Daniel W Langley, DO

Ophthalmology Physician in Tulsa, OK · enumerated 2005.

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

National Provider Identifier

1659361541

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Registry record

Entity type Individual (Type 1)

Name Daniel W Langley

Credential DO

Sex Male

Practice address Tulsa, OK, 74133

Phone (918) 250-2020

Fax (918) 250-2020

Enumeration date Oct 24, 2005

Last updated in NPPES Nov 10, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 4088 (OK) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
200014170A	Medicaid	OK	-
1418813	Other	OK	AETNA HMO
7736868	Other	OK	AETNA
P00373953	Other	OK	RAILROAD MEDICARE

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

Is NPI 1659361541 active?

Yes, as of the latest NPPES snapshot, NPI 1659361541 is active (record last updated 2025-11-10).

How do I verify Daniel Langley's NPI record?

Cross-check NPI 1659361541 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-10.