Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Steven A Zimmer, OD

Optometrist in Chisago City, MN · enumerated 2005.

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

National Provider Identifier

1366437758

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Registry record

Entity type Individual (Type 1)

Name Steven A Zimmer

Credential OD

Sex Male

Practice address 11725 Stinson Ave, Chisago City, MN, 55013

Phone (651) 257-8421

Fax (651) 257-8464

Enumeration date Sep 13, 2005

Last updated in NPPES Nov 14, 2013

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 1672 (MN) 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
424323400	Medicaid	MN	-

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

What specialty is Steven Zimmer?

Steven Zimmer is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-11-14.