Margaret M. Hayes, MD

Medicare activity in 2024

Official CMS public-use data for Margaret M. Hayes, 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)172 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)19 services
3. Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)16 services
4. Insertion of artery tube for blood sampling or infusion through skin (36620)13 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%
• Heart failure64%
• Chronic kidney disease58%
• Diabetes57%
• Anxiety56%

Hospitals where Margaret M. Hayes works

Medicare's Facility Affiliation Data lists Margaret M. Hayes 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.

• Beth Israel Deaconess Medical CenterBoston, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220086

Practice locations

Addresses where Margaret M. Hayes is enrolled with Medicare (CMS data updated October 2, 2026).

• 330 Brookline AveBoston, MA 02215 (617) 754‑8612

Group practices

Medicare enrollment lists Margaret M. Hayes as a member of this group (CMS data updated October 2, 2026).

• Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc1,740 clinicians in the group

Specialties

• Pulmonary Diseaseprimary
• 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 H. Moraco, MD
• Christopher M. Kearney, MD
• Rod A. Rahimi
• Katherine H. Walker, MD
• Andrew A. Wilson, MD
• Christine L. Campbell Reardon, MD
• Kai Saukkonen, MD
• Katrina A. Steiling, MD

All pulmonologists in Boston →

Other clinicians in Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

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

• Heather Bubencik
• Paul M. Bailey, MD
• Jessica P. Braveman, CNA
• Timothy J. Murtha, MD
• Alexander Morales
• Arriyan Dowlatshahi, 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