Quick answers
- Which hospitals does William R. Gwin Iii work at?
- Medicare's official clinician data lists William R. Gwin Iii at 1 hospital: University of Washington Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William R. Gwin Iii see patients?
- Medicare's clinician data lists 3 practice locations, including Seattle, WA. Call before your visit to confirm the address.
- What is William R. Gwin Iii's specialty?
- Medicare lists Medical Oncology as the primary specialty, and also Emergency Medicine, Hematology/Oncology and Internal Medicine.
- Does William R. Gwin Iii accept Medicare assignment?
- Yes. Medicare's clinician data says William R. Gwin 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.
- Does William R. Gwin Iii offer telehealth?
- Medicare's clinician data says William R. Gwin Iii offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for William R. Gwin Iii?
- (206) 598-3100, as listed in official Medicare / NPI Registry data.
- What is William R. Gwin Iii's NPI number?
- 1598875882. 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 R. Gwin Iii works
Medicare's Facility Affiliation Data lists William R. Gwin Iii at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University of Washington Medical CenterSeattle, WA · Acute Care Hospital · CCN 500008
Practice locations
Addresses where William R. Gwin Iii is enrolled with Medicare (CMS data updated 2026-10-02).
- 1701 Columbia RdSeattle, WA 98195 (206) 598‑3100
- 1959 NE Pacific StSeattle, WA 98195 (206) 598‑4333
- 825 Eastlake Ave ESeattle, WA 98109 (206) 288‑1000
Group practices
Medicare enrollment lists William R. Gwin Iii as a member of this group (CMS data updated 2026-10-02).
- The Association of University Physicians3,535 clinicians in the group
Specialties
- Medical Oncologyprimary
- Emergency Medicinealso
- Hematology/Oncologyalso
- Internal Medicinealso
Other oncologists in Seattle
Clinicians with the same Medicare primary specialty in Seattle, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Alabama School Of Medicine |
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1598875882 |
| 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