Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark R Winckler, OD

Optometrist in Pine Ridge, SD · enumerated 2006 · practices at Winckler Vision Center, Inc..

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

National Provider Identifier

1538268388

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Registry record

Entity type Individual (Type 1)

Name Mark R Winckler

Credential OD

Sex Male

Practice address 207 E Main St Ste 1, Pine Ridge, SD, 57770

Phone (605) 867-2772

Enumeration date Sep 21, 2006

Last updated in NPPES Jan 3, 2024

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 631 (SD) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 1269 (NE) 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
09902	Other	NE	BCBS OF NE
4993077	Other	SD	WELLMARK BCBS
9203683	Medicaid	SD	-
9203680	Medicaid	SD	-
P00390774	Other	NE	RR MEDICARE
9203682	Medicaid	SD	-

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

How do I verify Mark Winckler's NPI record?

Cross-check NPI 1538268388 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1538268388 active?

Yes, as of the latest NPPES snapshot, NPI 1538268388 is active (record last updated 2024-01-03).

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Winckler Vision Center, Inc. Optometrist · Pine Ridge, SD NPI 1134142243

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-03.