Quick answers
- Does Josiah O. Owinyo accept Medicare assignment?
- Yes. Medicare's clinician data says Josiah O. Owinyo accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Josiah O. Owinyo see?
- In 2024, CMS data shows 47 Original Medicare patients and 71 services for Josiah O. Owinyo. This counts Original Medicare only and measures volume, not quality.
- What is Josiah O. Owinyo's NPI number?
- 1114575966. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Josiah O. Owinyo, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 47 |
|---|---|
| Services billed to Medicare | 71 |
| Different services or procedures | 28 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure72%
- High cholesterol72%
- Arthritis45%
- Diabetes36%
- Chronic kidney disease32%
- Atrial fibrillation30%
Hospitals where Josiah O. Owinyo works
Medicare's Facility Affiliation Data lists Josiah O. Owinyo at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Swedish IssaquahIssaquah, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500152
Practice locations
Addresses where Josiah O. Owinyo is enrolled with Medicare (CMS data updated October 2, 2026).
- 747 BroadwaySeattle, WA 98122 (206) 386‑6000
- 751 NE Blakely DrIssaquah, WA 98029
Group practices
Medicare enrollment lists Josiah O. Owinyo as a member of this group (CMS data updated October 2, 2026).
- Swedish Health Services1,037 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Seattle
Clinicians with the same Medicare primary specialty in Seattle, WA — not a recommendation.
Other clinicians in Swedish Health Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114575966 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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