Chuan Hsin Chang, MD

Medicare activity in 2024

Official CMS public-use data for Chuan Hsin Chang, 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. Insertion of needle into vein for collection of blood sample (36415)224 services
2. Blood test, basic group of blood chemicals (calcium, total) (80048)180 services
3. Hemoglobin a1c level (83036)153 services
4. Thyroxine (thyroid chemical), free (84439)69 services
5. Blood test, thyroid stimulating hormone (tsh) (84443)69 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 pressure74%
• High cholesterol71%
• Diabetes68%
• Chronic kidney disease33%
• Osteoporosis33%
• Arthritis17%

Hospitals where Chuan Hsin Chang works

Medicare's Facility Affiliation Data lists Chuan Hsin Chang 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.

• California Pacific Medical Center- Van Ness CampusSan Francisco, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050047
• Peninsula Medical CenterBurlingame, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050007
• San Mateo Medical CenterSan Mateo, CA · Acute Care Hospital · Emergency services: listed by Medicare · CCN 050113

Practice locations

Addresses where Chuan Hsin Chang is enrolled with Medicare (CMS data updated October 2, 2026).

• 1520 Stockton StSan Francisco, CA 94133 (415) 391‑9686
• 22 W 39th Ave, Hos316msSan Mateo, CA 94403
• 222 W 39th AveSan Mateo, CA 94403

Group practices

Medicare enrollment lists Chuan Hsin Chang as a member of these groups (CMS data updated October 2, 2026).

• County of San Mateo310 clinicians in the group
• North East Medical Services143 clinicians in the group

Specialties

• Internal Medicineprimary
• Endocrinologyalso

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.

• Melanie F. Weingart, MD
• Mike Z. Yang, MD
• Fareeha Majeed, MD
• Claudio F. Gallina, MD
• Veronica E. Manzo, MD
• Aravind Mani, MD
• Roderick M. Thompson, MD
• Sanjay B. Reddy, MD

All internal medicine doctors in San Francisco →

Other clinicians in County of San Mateo

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

• Divy Ravindranath, MD
• Michael L. Getzell, MD
• Gilda L. Major, MD
• Amanda M. Romero, NP
• Barbara Y. Weissman, MD
• Lisa N. Cruz

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