Quick answers
- Does Elizabeth J. Sieders accept Medicare assignment?
- Yes. Medicare's clinician data says Elizabeth J. Sieders 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 Elizabeth J. Sieders see?
- In 2024, CMS data shows 130 Original Medicare patients and 2,071 services for Elizabeth J. Sieders. This counts Original Medicare only and measures volume, not quality.
- What is Elizabeth J. Sieders's NPI number?
- 1588042063. 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 Elizabeth J. Sieders, 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 | 130 |
|---|---|
| Services billed to Medicare | 2,071 |
| Different services or procedures | 102 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Most frequent services
- Insertion of needle into vein for collection of blood sample (36415)223 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)212 services
- Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)128 services
- Hemoglobin a1c level (83036)110 services
- Blood test, comprehensive group of blood chemicals (80053)108 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).
- High cholesterol69%
- High blood pressure64%
- Diabetes42%
- Arthritis41%
- Chronic kidney disease21%
- Anxiety16%
Hospitals where Elizabeth J. Sieders works
Medicare's Facility Affiliation Data lists Elizabeth J. Sieders 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.
- St Anthony HospitalPendleton, OR · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 381319
Practice locations
Addresses where Elizabeth J. Sieders is enrolled with Medicare (CMS data updated October 2, 2026).
- 46314 Timine WayPendleton, OR 97801 (541) 966‑9830
Group practices
Medicare enrollment lists Elizabeth J. Sieders as a member of this group (CMS data updated October 2, 2026).
- Yellowhawk Tribal Health Center16 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Pendleton
Clinicians with the same Medicare primary specialty in Pendleton, OR — not a recommendation.
Other clinicians in Yellowhawk Tribal Health Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588042063 |
| 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