Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marian Ruth Walker, O.D.

Optometrist in Dubuque, IA · enumerated 2006.

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

National Provider Identifier

1801842562

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Registry record

Entity type Individual (Type 1)

Name Marian Ruth Walker

Credential O.D.

Sex Female

Practice address 1500 Associates Dr, Dubuque, IA, 52002

Phone (563) 584-4415

Fax (563) 584-4256

Enumeration date May 25, 2006

Last updated in NPPES Jul 22, 2011

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 02044 (IA) Primary

152W00000X Optometrist Eye and Vision Services Providers · License 046-008889 (IL) Secondary

152W00000X Optometrist Eye and Vision Services Providers · License 2610-035 (WI) Secondary

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
014116	Medicaid	IA	-

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 Marian Walker's NPI record?

Cross-check NPI 1801842562 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1801842562 active?

Yes, as of the latest NPPES snapshot, NPI 1801842562 is active (record last updated 2011-07-22).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-07-22.