Quick answers
- Which hospitals does Greg P. Watchmaker work at?
- Medicare's official clinician data lists Greg P. Watchmaker at 4 hospitals: Ascension Columbia St Marys Hospital Milwaukee, Aurora Memorial Hospital Burlington, Aurora St Lukes Medical Center and Orthopaedic Hospital of Wisconsin. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Greg P. Watchmaker see patients?
- Medicare's clinician data lists 2 practice locations, including Mequon, WI and Milwaukee, WI. Call before your visit to confirm the address.
- What is Greg P. Watchmaker's specialty?
- Medicare lists Hand Surgery as the primary specialty.
- Does Greg P. Watchmaker accept Medicare assignment?
- Yes. Medicare's clinician data says Greg P. Watchmaker accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Greg P. Watchmaker?
- (262) 241-9224, as listed in official Medicare / NPI Registry data.
- What is Greg P. Watchmaker's NPI number?
- 1275564221. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Greg P. Watchmaker works
Medicare's Facility Affiliation Data lists Greg P. Watchmaker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Columbia St Marys Hospital MilwaukeeMilwaukee, WI · Acute Care Hospital · CCN 520051
- Aurora Memorial Hospital BurlingtonBurlington, WI · Acute Care Hospital · CCN 520059
- Aurora St Lukes Medical CenterMilwaukee, WI · Acute Care Hospital · CCN 520138
- Orthopaedic Hospital of WisconsinGlendale, WI · Acute Care Hospital · CCN 520194
Practice locations
Addresses where Greg P. Watchmaker is enrolled with Medicare (CMS data updated 2026-10-02).
- 1535 W Market StMequon, WI 53092 (262) 241‑9224
- 2801 W Kinnickinnic River Pkwy, Suite 860Milwaukee, WI 53215 (414) 649‑6000
Group practices
Medicare enrollment lists Greg P. Watchmaker as a member of this group (CMS data updated 2026-10-02).
- Milwaukee Hand Center S C4 clinicians in the group
Specialties
- Hand Surgeryprimary
Other hand surgeons in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Washington University School Of Medicine |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1275564221 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians