Quick answers
- Does Xiaoqian Zhang accept Medicare assignment?
- Yes. Medicare's clinician data says Xiaoqian Zhang 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 Xiaoqian Zhang see?
- In 2024, CMS data shows 2,139 Original Medicare patients and 10,292 services for Xiaoqian Zhang. This counts Original Medicare only and measures volume, not quality.
- What is Xiaoqian Zhang's NPI number?
- 1346474020. 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 Xiaoqian 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 | 2,139 |
|---|---|
| Services billed to Medicare | 10,292 |
| Different services or procedures | 63 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)1,735 services
- Injection, regadenoson, 0.1 mg (J2785)584 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)524 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)510 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)485 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%
- Arthritis46%
- Ischemic heart disease35%
- Chronic kidney disease35%
- Atrial fibrillation32%
Hospitals where Xiaoqian Zhang works
Medicare's Facility Affiliation Data lists Xiaoqian 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.
- John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050496
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050180
- San Ramon Regional Medical CenterSan Ramon, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050689
- Stanford Health Care Tri-ValleyPleasanton, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050283
- Sutter Delta Medical CenterAntioch, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050523
Practice locations
Addresses where Xiaoqian Zhang is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 12677 Alcosta BlvdSan Ramon, CA 94583
- 1450 Treat BlvdWalnut Creek, CA 94597
- 2400 Balfour Rd, Suite 120Brentwood, CA 94513 (925) 308‑8112
- 2485 High School Ave, Suite 100Concord, CA 94520 (925) 671‑0610
- 2700 Grant St, Suite 106Concord, CA 94520 (925) 685‑7598
Group practices
Medicare enrollment lists Xiaoqian Zhang as a member of this group (CMS data updated October 2, 2026).
- John Muir Physician Network494 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in California →
Other cardiologists in San Ramon
Clinicians with the same Medicare primary specialty in San Ramon, CA — not a recommendation.
Other clinicians in John Muir Physician Network
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 2004 (22 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) | 1346474020 |
| 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