Ronald M. Tsao, MD

Medicare activity in 2024

Official CMS public-use data for Ronald M. Tsao, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)340 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)87 services
3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)82 services
4. Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)76 services
5. Aspiration and/or injection of fluid from large joint (20610)73 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 cholesterol75%
• High blood pressure68%
• Arthritis54%
• Diabetes31%
• Ischemic heart disease22%
• Chronic kidney disease22%

Hospitals where Ronald M. Tsao works

Medicare's Facility Affiliation Data lists Ronald M. Tsao 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.

• Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050262
• Santa Monica - UCLA Medical Center & Orthopaedic HospitalSanta Monica, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050112
• Torrance Memorial Medical CenterTorrance, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050351

Practice locations

Addresses where Ronald M. Tsao is enrolled with Medicare (CMS data updated October 2, 2026).

• 200 Medical Plaza, Suite 365 BLos Angeles, CA 90095 (310) 825‑8061
• 2509 Pico BlvdSanta Monica, CA 90405 (310) 664‑7901

Group practices

Medicare enrollment lists Ronald M. Tsao as a member of these groups (CMS data updated October 2, 2026).

• The Regents of the University of California1,462 clinicians in the group
• Venice Family Clinic102 clinicians in the group

Specialties

• Internal Medicineprimary
• Pediatric Medicinealso
• Sports Medicinealso

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Los Angeles

Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.

• Ly-Elaine Pham, MD
• Shahram Shafi, MD
• Sudarmo Winarko, MD
• Anthony J. D'Oro, MD
• Varsha Kandadi, MD
• Jonathan R. Neyer, MD
• Elizabeth K. Asfaw, MD
• Niloofar Nobakht, MD

All internal medicine doctors in Los Angeles →

Other clinicians in The Regents of the University of California

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

• Shahram Shafi, MD
• Angela M. Leung, MD
• Dawn M. Silverman, NP
• Sonia Jasuja, MD
• Sophia G. Scattaglia
• Jan B. Janay, 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