Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Maria E Linnaus, M.D.

Surgery Physician in Eau Claire, WI · enumerated 2013.

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

National Provider Identifier

1609210558

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Registry record

Entity type Individual (Type 1)

Name Maria E Linnaus

Credential M.D.

Sex Female

Practice address 1400 Bellinger St, Eau Claire, WI, 54703

Phone (715) 838-5222

Enumeration date Apr 22, 2013

Last updated in NPPES Apr 25, 2022

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 49614 (AZ) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 67507 (MN) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License R73759 (AZ) Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 70899 (WI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Maria Linnaus?

The National Provider Identifier (NPI) for Maria Linnaus is 1609210558, a Type 1 (individual) record in the CMS NPPES registry.

Where does Maria Linnaus practice?

The practice location on file with NPPES is in Eau Claire, WI. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-04-25.