Quick answers
- Which hospitals does Stephen A. Williams work at?
- Medicare's official clinician data lists Stephen A. Williams at 4 hospitals: Bay Area Hospital, Mercy Medical Center, Sacred Heart Medical Center - Riverbend and Southern Coos Hospital & Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Stephen A. Williams see patients?
- Medicare's clinician data lists 1 practice location in Roseburg, OR. Call before your visit to confirm the address.
- What is Stephen A. Williams's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Stephen A. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Stephen A. Williams 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 Stephen A. Williams?
- (541) 229-4070, as listed in official Medicare / NPI Registry data.
- What is Stephen A. Williams's NPI number?
- 1437370947. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Stephen A. Williams works
Medicare's Facility Affiliation Data lists Stephen A. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Bay Area HospitalCoos Bay, OR · Acute Care Hospital · CCN 380090
- Mercy Medical CenterRoseburg, OR · Acute Care Hospital · CCN 380027
- Sacred Heart Medical Center - RiverbendSpringfield, OR · Acute Care Hospital · CCN 380102
- Southern Coos Hospital & Health CenterBandon, OR · Critical Access Hospital · CCN 381304
Practice locations
Addresses where Stephen A. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 2880 NW Stewart Pkwy, Suite 300Roseburg, OR 97471 (541) 229‑4070
Group practices
Medicare enrollment lists Stephen A. Williams as a member of this group (CMS data updated 2026-10-02).
- Steelhead Specialty Group PC4 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Oregon
Clinicians with the same Medicare primary specialty in Oregon — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1437370947 |
| 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