Quick answers
- Does Yien Chiong accept Medicare assignment?
- Yes. Medicare's clinician data says Yien Chiong 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 Yien Chiong see?
- In 2024, CMS data shows 260 Original Medicare patients and 2,042 services for Yien Chiong. This counts Original Medicare only and measures volume, not quality.
- What is Yien Chiong's NPI number?
- 1205068012. 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 Yien Chiong, 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 | 260 |
|---|---|
| Services billed to Medicare | 2,042 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Insertion of needle into vein for collection of blood sample (36415)342 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)304 services
- Hemoglobin a1c level (83036)242 services
- Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (95251)150 services
- Blood test, thyroid stimulating hormone (tsh) (84443)133 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 blood pressure75%
- High cholesterol75%
- Diabetes67%
- Chronic kidney disease45%
- Arthritis44%
- Depression28%
Hospitals where Yien Chiong works
Medicare's Facility Affiliation Data lists Yien Chiong 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.
- Bay Area HospitalCoos Bay, OR · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 380090
- Lower Umpqua Hospital DistrictReedsport, OR · Critical Access Hospital · Emergency services: listed by Medicare · CCN 381311
- McKenzie-Willamette Medical CenterSpringfield, OR · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 380020
- Mercy Medical CenterRoseburg, OR · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 380027
- Peace Harbor Medical CenterFlorence, OR · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 381316
Practice locations
Addresses where Yien Chiong is enrolled with Medicare (CMS data updated October 2, 2026).
- 600 Country Club RdEugene, OR 97401 (541) 345‑0600
Group practices
Medicare enrollment lists Yien Chiong as a member of this group (CMS data updated October 2, 2026).
- Oregon Healthcare Resources LLC159 clinicians in the group
Specialties
- Endocrinologyprimary
Other endocrinologists in Eugene
Clinicians with the same Medicare primary specialty in Eugene, OR — not a recommendation.
Other clinicians in Oregon Healthcare Resources LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2009 (17 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1205068012 |
| 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