Fausan S. Tsai, MD

Medicare activity in 2024

Official CMS public-use data for Fausan S. Tsai, 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.

Most frequent services

1. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)76 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 pressure73%
• High cholesterol61%
• Arthritis57%
• Diabetes44%
• Chronic kidney disease38%
• Ischemic heart disease36%

Hospitals where Fausan S. Tsai works

Medicare's Facility Affiliation Data lists Fausan S. Tsai 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.

• Kaiser Foundation Hospital - AntiochAntioch, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050760
• Kaiser Foundation Hospital - Walnut CreekWalnut Creek, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050072

Practice locations

Addresses where Fausan S. Tsai is enrolled with Medicare (CMS data updated October 2, 2026).

• 1425 S Main StWalnut Creek, CA 94596 (925) 295‑4000
• 1515 Newell AveWalnut Creek, CA 94596 (925) 295‑4000
• 4501 Sand Creek RdAntioch, CA 94531 (925) 813‑6500
• 901 Nevin AveRichmond, CA 94801 (510) 307‑1500

Group practices

Medicare enrollment lists Fausan S. Tsai as a member of this group (CMS data updated October 2, 2026).

• Permanente Medical Group Inc10,996 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary

Find other Cardiovascular Disease (Cardiology) doctors in California →

Other cardiologists in Walnut Creek

Clinicians with the same Medicare primary specialty in Walnut Creek, CA — not a recommendation.

• Jacqueline Kircher, MD
• Jeffrey L. Sobel, MD
• Ryan A. Brown, MD
• Hennessey Tseng, MD
• Perkin Shiu, MD
• Yi Lu, MD
• Carolyn S. Lacey, MD
• Matthew S. Devane, DO

All cardiologists in Walnut Creek →

Other clinicians in Permanente Medical Group Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Erica C. Garcia, PT
• William N. Hamstra, DO
• Sailaja P. Allanki, MD
• Suzanne M. Bourque, MD
• Dan Kemper, MD
• Miguel A. Martinez-Romo, MD

Clinician information

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

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians