Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael S Messer, D.D.S.

Dentist in Oconomowoc, WI · enumerated 2010.

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

National Provider Identifier

1518278233

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael S Messer

Credential D.D.S.

Sex Male

Practice address 888 Thackeray Trl, Ste 215, Oconomowoc, WI, 53066

Phone (262) 567-6003

Fax (262) 567-6001

Enumeration date Jun 28, 2010

Last updated in NPPES Feb 9, 2012

Taxonomy & licenses

122300000X Dentist Dental Providers · License 6550-015 (WI) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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 Michael Messer?

Michael Messer is registered in NPPES with the primary taxonomy of Dentist. 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 2012-02-09.