Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum
Michael H Mcdonald Mdsc
Otolaryngology Physician in Madison, WI · enumerated 2005 · authorized official Michael Mcdonald, President.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1265432827
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Registry record
Taxonomy & classification
Authorized official
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 040004902 | Other | — | RAILROAD MEDICARE |
| 1000403 | Other | WI | PHYSICIANS PLUS HMO |
| 30423300 | Medicaid | WI | — |
| 564927 | Other | WI | DEAN HEALTH PLAN VENDOR # |
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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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-08-20.