Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark A. Mlsna, O.D.

Optometrist in Menomonee Falls, WI · enumerated 2006.

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

National Provider Identifier

1386743425

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark A. Mlsna

Credential O.D.

Sex Male

Practice address N89w16785 Appleton Ave, Menomonee Falls, WI, 53051

Phone (262) 253-4000

Fax (262) 253-4100

Enumeration date Sep 22, 2006

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License TPA 2057-035 (WI) 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

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.

What specialty is Mark Mlsna?

Mark Mlsna 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.