Quick answers
- Which hospitals does Arnold K. Cha work at?
- Medicare's official clinician data lists Arnold K. Cha at 1 hospital: Island Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Arnold K. Cha see patients?
- Medicare's clinician data lists 6 practice locations, including Clackamas, OR, Longview, WA and Portland, OR. Call before your visit to confirm the address.
- What is Arnold K. Cha's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Arnold K. Cha accept Medicare assignment?
- Yes. Medicare's clinician data says Arnold K. Cha 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 Arnold K. Cha?
- (800) 813-2000, as listed in official Medicare / NPI Registry data.
- What is Arnold K. Cha's NPI number?
- 1811320179. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Arnold K. Cha works
Medicare's Facility Affiliation Data lists Arnold K. Cha at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Island HospitalAnacortes, WA · Acute Care Hospital · CCN 500007
Practice locations
Addresses where Arnold K. Cha is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 10100 SE Sunnyside RdClackamas, OR 97015 (800) 813‑2000
- 10180 SE Sunnyside RdClackamas, OR 97015 (800) 813‑2000
- 1230 7th AveLongview, WA 98632 (800) 813‑2000
- 3500 N Interstate AvePortland, OR 97227 (800) 813‑2000
- 3550 N Interstate AvePortland, OR 97227 (800) 813‑2000
Group practices
Medicare enrollment lists Arnold K. Cha as a member of these groups (CMS data updated 2026-10-02).
- Kaiser Foundation Health Plan of the Northwest1,807 clinicians in the group
- Northwest Emergency Physicians LLC271 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Clackamas
Clinicians with the same Medicare primary specialty in Clackamas, OR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811320179 |
| 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