Quick answers
- Which hospitals does William C. Chapin work at?
- Medicare's official clinician data lists William C. Chapin at 5 hospitals: OHSU Hospital and Clinics, Providence Newberg Medical Center, Providence Portland Medical Center, Providence St Vincent Medical Center and Providence Willamette Falls Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William C. Chapin see patients?
- Medicare's clinician data lists 3 practice locations, including Portland, OR. Call before your visit to confirm the address.
- What is William C. Chapin's specialty?
- Medicare lists Endocrinology as the primary specialty.
- Does William C. Chapin accept Medicare assignment?
- Yes. Medicare's clinician data says William C. Chapin 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 C. Chapin offer telehealth?
- Medicare's clinician data says William C. Chapin offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for William C. Chapin?
- (503) 216-2111, as listed in official Medicare / NPI Registry data.
- What is William C. Chapin's NPI number?
- 1083653679. 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 C. Chapin works
Medicare's Facility Affiliation Data lists William C. Chapin 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
- Providence Newberg Medical CenterNewberg, OR · Acute Care Hospital · CCN 380037
- Providence Portland Medical CenterPortland, OR · Acute Care Hospital · CCN 380061
- Providence St Vincent Medical CenterPortland, OR · Acute Care Hospital · CCN 380004
- Providence Willamette Falls Medical CenterOregon City, OR · Acute Care Hospital · CCN 380038
Practice locations
Addresses where William C. Chapin is enrolled with Medicare (CMS data updated 2026-10-02).
- 4805 NE Glisan St, Suite 6n40Portland, OR 97213 (503) 216‑2111
- 9155 SW Barnes Rd, Suite 638Portland, OR 97225 (503) 216‑7000
- 9205 SW Barnes RdPortland, OR 97225 (503) 216‑2213
Group practices
Medicare enrollment lists William C. Chapin as a member of these groups (CMS data updated 2026-10-02).
- Providence Health and Services Oregon1,433 clinicians in the group
- Providence Health and Services - Oregon208 clinicians in the group
Specialties
- Endocrinologyprimary
Other endocrinologists in Portland
Clinicians with the same Medicare primary specialty in Portland, OR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Pennsylvania |
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1083653679 |
| 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