Helen Z. Leung, MD

Medicare activity in 2024

Official CMS public-use data for Helen Z. Leung, 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. Anesthesia for exam of colon using an endoscope (00812)31 services
2. Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)21 services
3. Anesthesia for other procedure on large bowel using an endoscope (00811)15 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 pressure72%
• High cholesterol71%
• Arthritis43%
• Depression34%
• Anxiety30%
• Atrial fibrillation30%

Hospitals where Helen Z. Leung works

Medicare's Facility Affiliation Data lists Helen Z. Leung 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.

• Mount Auburn HospitalCambridge, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220002
• Winchester HospitalWinchester, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220105

Practice locations

Addresses where Helen Z. Leung is enrolled with Medicare (CMS data updated October 2, 2026).

• 330 Mount Auburn StCambridge, MA 02138 (781) 453‑7300
• 41 Highland AveWinchester, MA 01890 (781) 756‑2190

Group practices

Medicare enrollment lists Helen Z. Leung as a member of these groups (CMS data updated October 2, 2026).

• Associated Physicians of Harvard Medical Faculty Physicians at Beth Is565 clinicians in the group
• Winchester Anesthesia Associates, Inc67 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in Massachusetts →

Other anesthesiologists in Cambridge

Clinicians with the same Medicare primary specialty in Cambridge, MA — not a recommendation.

• William Weir, MD
• Anna Margulian, MD
• Jason Z. Qu, MD
• Dezhen Zhang, MD
• Jie Zhou, MD
• Sharon Herman Berreby, MD
• Juan Li, MD
• Maria Grig, MD

All anesthesiologists in Cambridge →

Other clinicians in Associated Physicians of Harvard Medical Faculty Physicians at Beth Is

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

• Susan J. Roessle, CNA
• Tejas B. Patel, MD
• Mark A. Lipsky, MD
• Mark Kats, MD
• Jonathan Shapiro, MD
• Elzbieta B. Griffiths, 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