Justin Tien, MD

Medicare activity in 2024

Official CMS public-use data for Justin Tien, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)126 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)96 services
3. Hospital discharge day management, more than 30 minutes (99239)33 services
4. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)29 services
5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)29 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 cholesterol62%
• Diabetes50%
• Arthritis41%
• Alzheimer's disease or dementia41%
• Depression40%

Hospitals where Justin Tien works

Medicare's Facility Affiliation Data lists Justin Tien 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.

• Zuckerberg San Francisco General Hospital & Trauma CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050228

Practice locations

Addresses where Justin Tien is enrolled with Medicare (CMS data updated October 2, 2026).

• 1001 Potrero AveSan Francisco, CA 94110 (628) 206‑4774

Group practices

Medicare enrollment lists Justin Tien as a member of this group (CMS data updated October 2, 2026).

• University of California SFGH Medical Group587 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in San Francisco

Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.

• Emily Kinebuchi, MD
• Phuoc V. Le, MD
• Kevin Gates, MD
• Mike K. Cheng, MD
• Virginia Gonzalez, MD
• Alla Boykoff, MD
• Vivek Musinipally, MD
• Therese A. Chan Tack, DO

All internal medicine doctors in San Francisco →

Other clinicians in University of California SFGH Medical Group

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

• Craig D. Newgard, MD
• Elizabeth E. Uy Smith
• Oliver M. Bacon, MD
• John S. Macgregor, MD
• Aaron L. Berkowitz, MD
• Christopher T. Nguyen, 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