Quick answers
- Which hospitals does Casey Williamson work at?
- Medicare's official clinician data lists Casey Williamson at 2 hospitals: OHSU Hospital and Clinics and Salem Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Casey Williamson see patients?
- Medicare's clinician data lists 1 practice location in Portland, OR. Call before your visit to confirm the address.
- What is Casey Williamson's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Casey Williamson accept Medicare assignment?
- Yes. Medicare's clinician data says Casey Williamson 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 Casey Williamson offer telehealth?
- Medicare's clinician data says Casey Williamson offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Casey Williamson?
- (503) 494-8311, as listed in official Medicare / NPI Registry data.
- What is Casey Williamson's NPI number?
- 1437683570. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Casey Williamson works
Medicare's Facility Affiliation Data lists Casey Williamson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- OHSU Hospital and ClinicsPortland, OR · Acute Care Hospital · CCN 380009
- Salem HospitalSalem, OR · Acute Care Hospital · CCN 380051
Practice locations
Addresses where Casey Williamson is enrolled with Medicare (CMS data updated 2026-10-02).
- 3181 SW Sam Jackson Park RdPortland, OR 97239 (503) 494‑8311
Group practices
Medicare enrollment lists Casey Williamson as a member of this group (CMS data updated 2026-10-02).
- University Professional Services1,724 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Portland
Clinicians with the same Medicare primary specialty in Portland, OR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Diego School Of Medicine |
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1437683570 |
| 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