Quick answers
- Which hospitals does Will D. Lyon work at?
- Medicare's official clinician data lists Will D. Lyon at 1 hospital: Froedtert Memorial Lutheran Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Will D. Lyon see patients?
- Medicare's clinician data lists 4 practice locations, including Milwaukee, WI, Germantown, WI and Menomonee Falls, WI. Call before your visit to confirm the address.
- What is Will D. Lyon's specialty?
- Medicare lists Geriatric Medicine as the primary specialty.
- Does Will D. Lyon accept Medicare assignment?
- Yes. Medicare's clinician data says Will D. Lyon 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 Will D. Lyon?
- (414) 805-3666, as listed in official Medicare / NPI Registry data.
- What is Will D. Lyon's NPI number?
- 1245791607. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Will D. Lyon works
Medicare's Facility Affiliation Data lists Will D. Lyon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Froedtert Memorial Lutheran HospitalMilwaukee, WI · Acute Care Hospital · CCN 520177
Practice locations
Addresses where Will D. Lyon is enrolled with Medicare (CMS data updated 2026-10-02).
- 8701 W Watertown PlankMilwaukee, WI 53226 (414) 805‑3666
- 8701 Watertown Plank Rd, Room 4041 MfrcMilwaukee, WI 53226 (414) 805‑3666
- W168n11237 Western AveGermantown, WI 53022 (262) 253‑5060
- W180n8000 Town Hall RdMenomonee Falls, WI 53051 (262) 255‑2500
Group practices
Medicare enrollment lists Will D. Lyon as a member of these groups (CMS data updated 2026-10-02).
- The Medical College of Wisconsin Inc2,115 clinicians in the group
- Froedtert Andthe Medical College of Wisconsin Community Physicians Inc1,285 clinicians in the group
Specialties
- Geriatric Medicineprimary
Other geriatricians in Milwaukee
Clinicians with the same Medicare primary specialty in Milwaukee, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Wisconsin School Of Medicine |
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245791607 |
| 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