Peggy S. Lai, MD

Medicare activity in 2024

Official CMS public-use data for Peggy S. Lai, 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. Critical care, first 30-74 minutes (99291)149 services
2. Test to measure rate of airflow (94375)143 services
3. Test to examine how well the lungs exchange gases (94729)109 services
4. Test to measure expiratory airflow and volume changes before and after medication administration (94060)46 services
5. Test to determine lung volumes using sensors (94726)44 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 cholesterol75%
• COPD51%
• Arthritis47%
• Ischemic heart disease45%
• Chronic kidney disease41%

Hospitals where Peggy S. Lai works

Medicare's Facility Affiliation Data lists Peggy S. Lai 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.

• Massachusetts General HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220071

Practice locations

Addresses where Peggy S. Lai is enrolled with Medicare (CMS data updated October 2, 2026).

• 55 Fruit StBoston, MA 02114 (617) 724‑0287

Group practices

Medicare enrollment lists Peggy S. Lai as a member of this group (CMS data updated October 2, 2026).

• Massachusetts General Physicians Organization Inc3,558 clinicians in the group

Specialties

• Pulmonary Diseaseprimary
• Critical Care (Intensivists)also
• Internal Medicinealso

Find other Pulmonary Disease doctors in Massachusetts →

Other pulmonologists in Boston

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

• Andrew J. Admon, MD
• Christopher V. Cosgriff, MD
• Burton H. Shen, MD
• Crystal M. North, MD
• Raja-Elie Abdulnour, MD
• Michael H. Ieong, MD
• Sahil Patel, MD
• Salma Batool Anwar, MD

All pulmonologists in Boston →

Other clinicians in Massachusetts General Physicians Organization Inc

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

• Marvin Ryou, MD
• David Mischoulon, MD
• Evan A. Odonnell, MD
• Jeremy Goverman, MD
• Julia E. Hooker
• Caroline M. Mitchell, 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