Quick answers
- Where does William D. Ewing Iii see patients?
- Medicare's clinician data lists 2 practice locations, including Glendale, WI and Greenfield, WI. Call before your visit to confirm the address.
- What is William D. Ewing Iii's specialty?
- Medicare lists Clinical Psychologist as the primary specialty.
- Does William D. Ewing Iii accept Medicare assignment?
- Yes. Medicare's clinician data says William D. Ewing Iii 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 William D. Ewing Iii?
- (414) 962-1000, as listed in official Medicare / NPI Registry data.
- What is William D. Ewing Iii's NPI number?
- 1417442021. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where William D. Ewing Iii is enrolled with Medicare (CMS data updated 2026-10-02).
- 6110 N Port Washington RdGlendale, WI 53217 (414) 962‑1000
- 6520 W Layton Ave, Suite 206Greenfield, WI 53220 (414) 962‑1000
Group practices
Medicare enrollment lists William D. Ewing Iii as a member of this group (CMS data updated 2026-10-02).
- Medical Psychology Associates, Inc.9 clinicians in the group
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in Glendale
Clinicians with the same Medicare primary specialty in Glendale, WI — not a recommendation.
Clinician information
| Graduation year | 2025 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1417442021 |
| 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
- 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