Quick answers
- Does Yixi Zhang accept Medicare assignment?
- Medicare's clinician data says Yixi Zhang may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Yixi Zhang see?
- In 2024, CMS data shows 240 Original Medicare patients and 301 services for Yixi Zhang. This counts Original Medicare only and measures volume, not quality.
- What is Yixi Zhang's NPI number?
- 1457709800. 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 Yixi Zhang, 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 | 240 |
|---|---|
| Services billed to Medicare | 301 |
| Different services or procedures | 7 |
| Participating Medicare provider | Yes |
| Average age of these patients | 79 |
Most frequent services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)164 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)64 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)31 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)20 services
- Hospital discharge day management, more than 30 minutes (99239)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).
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Ischemic heart disease48%
- Atrial fibrillation43%
- Chronic kidney disease42%
Hospitals where Yixi Zhang works
Medicare's Facility Affiliation Data lists Yixi Zhang 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.
- Chinese HospitalSan Francisco, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050407
- Kaiser Foundation HospitalSan Rafael, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050510
- Marinhealth Medical CenterGreenbrae, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050360
- Novato Community HospitalNovato, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050131
- Peninsula Medical CenterBurlingame, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050007
Practice locations
Addresses where Yixi Zhang is enrolled with Medicare (CMS data updated October 2, 2026).
- 1501 Trousdale DrBurlingame, CA 94010 (650) 696‑3520
- 250 Bon Air RdGreenbrae, CA 94904 (415) 925‑7000
- 845 Jackson StSan Francisco, CA 94133 (415) 779‑8868
- 99 Montecillo RdSan Rafael, CA 94903 (415) 444‑2000
Group practices
Medicare enrollment lists Yixi Zhang as a member of these groups (CMS data updated October 2, 2026).
- Permanente Medical Group Inc10,996 clinicians in the group
- Galen Inpatient Physicians PC1,077 clinicians in the group
- Peninsula Hospitalist Associates Inc41 clinicians in the group
- San Francisco Unified Physicians Group, Inc19 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Burlingame
Clinicians with the same Medicare primary specialty in Burlingame, CA — not a recommendation.
Other clinicians in Permanente Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 2015 (11 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1457709800 |
| 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