Quick answers
- Does Sai Ying M. Tang accept Medicare assignment?
- Yes. Medicare's clinician data says Sai Ying M. Tang 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 Sai Ying M. Tang see?
- In 2024, CMS data shows 350 Original Medicare patients and 540 services for Sai Ying M. Tang. This counts Original Medicare only and measures volume, not quality.
- What is Sai Ying M. Tang's NPI number?
- 1164772448. 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 Sai Ying M. Tang, 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 | 350 |
|---|---|
| Services billed to Medicare | 540 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)188 services
- Routine electrocardiogram (ecg) using at least 12 leads with tracing (93005)187 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)96 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)23 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)19 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%
- Arthritis67%
- Chronic kidney disease32%
- Diabetes31%
- Depression27%
Hospitals where Sai Ying M. Tang works
Medicare's Facility Affiliation Data lists Sai Ying M. Tang 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.
- Alameda HospitalAlameda, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050211
- Highland HospitalOakland, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050320
- 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
Practice locations
Addresses where Sai Ying M. Tang is enrolled with Medicare (CMS data updated October 2, 2026).
- 122 La Casa Via, Suite 120Walnut Creek, CA 94598 (925) 941‑4058
- 6955 Foothill Blvd, Suite 200Oakland, CA 94605 (510) 567‑5704
Group practices
Medicare enrollment lists Sai Ying M. Tang as a member of these groups (CMS data updated October 2, 2026).
- Alameda Health System601 clinicians in the group
- John Muir Physician Network494 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Walnut Creek
Clinicians with the same Medicare primary specialty in Walnut Creek, CA — not a recommendation.
Other clinicians in Alameda Health System
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164772448 |
| 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