Quick answers
- Does Lydia K. Fiez accept Medicare assignment?
- Yes. Medicare's clinician data says Lydia K. Fiez 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 Lydia K. Fiez see?
- In 2024, CMS data shows 129 Original Medicare patients and 477 services for Lydia K. Fiez. This counts Original Medicare only and measures volume, not quality.
- What is Lydia K. Fiez's NPI number?
- 1124628359. 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 Lydia K. Fiez, 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 | 129 |
|---|---|
| Services billed to Medicare | 477 |
| Different services or procedures | 36 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- X-ray of shoulder, minimum of 2 views (73030)78 services
- Prosthetic repair of shoulder joint, total shoulder (23472)66 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)50 services
- Shaving of part of shoulder bone and repair of ligament using an endoscope (29826)16 services
- Removal of extensive shoulder joint tissue using an endoscope (29823)15 services
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).
- Arthritis75%
- High cholesterol74%
- High blood pressure66%
- Ischemic heart disease26%
- Anxiety19%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)17%
Hospitals where Lydia K. Fiez works
Medicare's Facility Affiliation Data lists Lydia K. Fiez 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 Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500027
Practice locations
Addresses where Lydia K. Fiez is enrolled with Medicare (CMS data updated October 2, 2026).
- 601 Broadway, Suite 700Seattle, WA 98122 (206) 622‑2600
Group practices
Medicare enrollment lists Lydia K. Fiez as a member of this group (CMS data updated October 2, 2026).
- Opa Ortho PLLC41 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 Opa Ortho PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124628359 |
| 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