Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Douglas Dean Wallin, OD

Optometrist in Sioux Falls, SD · enumerated 2005.

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

National Provider Identifier

1114923034

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Registry record

Entity type Individual (Type 1)

Name Douglas Dean Wallin

Credential OD

Sex Male

Practice address 3101 W 57th St, Sioux Falls, SD, 57108

Phone (605) 361-3937

Fax (605) 371-7199

Enumeration date Jun 24, 2005

Last updated in NPPES May 21, 2024

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 525 (SD) 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.

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Frequently asked questions

How do I verify Douglas Wallin's NPI record?

Cross-check NPI 1114923034 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1114923034 active?

Yes, as of the latest NPPES snapshot, NPI 1114923034 is active (record last updated 2024-05-21).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-05-21.