Quick answers
- Does Yi Hsieh accept Medicare assignment?
- Yes. Medicare's clinician data says Yi Hsieh 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 Yi Hsieh see?
- In 2024, CMS data shows 449 Original Medicare patients and 3,729 services for Yi Hsieh. This counts Original Medicare only and measures volume, not quality.
- What is Yi Hsieh's NPI number?
- 1184628661. 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 Yi Hsieh, 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 | 449 |
|---|---|
| Services billed to Medicare | 3,729 |
| Different services or procedures | 57 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)744 services
- Psa (prostate specific antigen) measurement, total (84153)394 services
- Insertion of needle into vein for collection of blood sample (36415)391 services
- Complete ultrasound scan behind abdominal cavity (76770)375 services
- Ultrasound scan of pelvic region through rectum (76872)356 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%
- Arthritis39%
- Diabetes32%
- Ischemic heart disease30%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)30%
Hospitals where Yi Hsieh works
Medicare's Facility Affiliation Data lists Yi Hsieh 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.
- Capital Medical CenterOlympia, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500139
- Multicare Auburn Medical CenterAuburn, WA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 500015
- St Francis Community HospitalFederal Way, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 500141
- St Joseph Medical CenterTacoma, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500108
- Tacoma General Allenmore HospitalTacoma, WA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 500129
Practice locations
Addresses where Yi Hsieh is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 N Oak AveMarshfield, WI 54449 (715) 387‑5511
- 202 Division St N, Suite 100Auburn, WA 98001 (253) 833‑3555
- 34612 6th Ave S, Suite 210Federal Way, WA 98003 (253) 927‑1882
Group practices
Medicare enrollment lists Yi Hsieh as a member of these groups (CMS data updated October 2, 2026).
- MCHS Hospitals Inc1,197 clinicians in the group
- Surgical Associates Northwest PC13 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Marshfield
Clinicians with the same Medicare primary specialty in Marshfield, WI — not a recommendation.
Other clinicians in MCHS Hospitals Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1997 (29 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1184628661 |
| 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