Quick answers
- Which hospitals does William E. Maes work at?
- Medicare's official clinician data lists William E. Maes at 2 hospitals: Swedish Medical Center and Valley Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William E. Maes see patients?
- Medicare's clinician data lists 3 practice locations, including Seattle, WA. Call before your visit to confirm the address.
- What is William E. Maes's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does William E. Maes accept Medicare assignment?
- Yes. Medicare's clinician data says William E. Maes 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 E. Maes?
- (206) 296-4990, as listed in official Medicare / NPI Registry data.
- What is William E. Maes's NPI number?
- 1114488525. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William E. Maes works
Medicare's Facility Affiliation Data lists William E. Maes at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Swedish Medical CenterSeattle, WA · Acute Care Hospital · CCN 500027
- Valley Medical CenterRenton, WA · Acute Care Hospital · CCN 500088
Practice locations
Addresses where William E. Maes is enrolled with Medicare (CMS data updated 2026-10-02).
- 10521 Meridian Ave NSeattle, WA 98133 (206) 296‑4990
- 4400 37th Ave SSeattle, WA 98118 (206) 461‑6957
- 9245 Rainier Ave SSeattle, WA 98118 (206) 722‑8444
Group practices
Medicare enrollment lists William E. Maes as a member of this group (CMS data updated 2026-10-02).
- Neighborcare Health99 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Seattle
Clinicians with the same Medicare primary specialty in Seattle, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114488525 |
| 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