Thomas H. Yun, MD

Medicare activity in 2024

Official CMS public-use data for Thomas H. Yun, 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)492 services
2. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)76 services
3. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)72 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)42 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)42 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 pressure74%
• Arthritis56%
• Ischemic heart disease38%
• Diabetes31%
• Anxiety23%

Hospitals where Thomas H. Yun works

Medicare's Facility Affiliation Data lists Thomas H. Yun 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
• UCLA West Valley Medical CenterWest Hills, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050481

Practice locations

Addresses where Thomas H. Yun is enrolled with Medicare (CMS data updated October 2, 2026).

• 2020 Santa Monica Blvd, Suite 210Santa Monica, CA 90404 (310) 458‑2381
• 7345 Medical Ctr Dr, Suite 420West Hills, CA 91307 (805) 494‑6020

Group practices

Medicare enrollment lists Thomas H. Yun as a member of this group (CMS data updated October 2, 2026).

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

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Santa Monica

Clinicians with the same Medicare primary specialty in Santa Monica, CA — not a recommendation.

• Kevin C. O'Fee, MD
• Tanvi A. Desai, MD
• Daniel M. Kozman, MD
• Phoebe Y. Chen, MD
• Laura D. Simpler, MD
• Arineh S. Melkonian, MD
• Tri M. Nguyen, DO
• Abdollah Yousefzadeh, MD

All internal medicine doctors in Santa Monica →

Other clinicians in The Regents of the University of California

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

• Michelle D. Kelley, MD
• Demetrios G. Stavrakis, MD
• Shira M. Grock, MD
• Tanvi A. Desai, MD
• Alexandra M. Glaeser, MD
• Erin D. Chamberlain, 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