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Dr. Greg Peter Watchmaker, MD

Orthopaedic Hand Surgery Physician in Mequon, WI · enumerated 2006 · practices at Milwaukee Hand Center S C.

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

National Provider Identifier

1275564221

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Registry record

Entity type Individual (Type 1)
Name Dr. Greg Peter Watchmaker
Credential MD
Sex Male
Practice address 1535 W Market St, Mequon, WI, 53092
Phone (262) 241-9224
Fax (262) 241-9228
Enumeration date Jul 6, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207XS0106X Orthopaedic Hand Surgery Physician Allopathic & Osteopathic Physicians · License 37648 (WI) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
32228800 Medicaid WI -

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 Greg Watchmaker?
Greg Watchmaker is registered in NPPES with the primary taxonomy of Orthopaedic Hand Surgery Physician. 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 2007-07-08.