Quick answers
- Does Yichieh Shiuey accept Medicare assignment?
- Yes. Medicare's clinician data says Yichieh Shiuey 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 Yichieh Shiuey see?
- In 2024, CMS data shows 678 Original Medicare patients and 2,863 services for Yichieh Shiuey. This counts Original Medicare only and measures volume, not quality.
- What is Yichieh Shiuey's NPI number?
- 1508948993. 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 Yichieh Shiuey, 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 | 678 |
|---|---|
| Services billed to Medicare | 2,863 |
| Different services or procedures | 37 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)668 services
- Measurement of corneal curvature and depth of eye (92136)374 services
- Ct scan of cornea (92025)348 services
- Imaging of front third of eye using a special microscope (92286)212 services
- Imaging of front third of eye (92132)209 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 cholesterol74%
- High blood pressure65%
- Arthritis35%
- Diabetes25%
- Osteoporosis21%
- Ischemic heart disease18%
Practice locations
Addresses where Yichieh Shiuey is enrolled with Medicare (CMS data updated October 2, 2026).
- 1085 W El Camino RealSunnyvale, CA 94087 (408) 524‑5900
- 1128 W El Camino RealMountain View, CA 94040 (650) 964‑3200
- 370 Distel CirLos Altos, CA 94022 (650) 254‑5200
Group practices
Medicare enrollment lists Yichieh Shiuey as a member of this group (CMS data updated October 2, 2026).
- Sutter Bay Medical Foundation3,829 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Sunnyvale
Clinicians with the same Medicare primary specialty in Sunnyvale, CA — not a recommendation.
Other clinicians in Sutter Bay Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Francisco School Of Medicine |
| Graduation year | 1994 (32 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1508948993 |
| 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
- 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