Sean J. Breslin, MD

Medicare activity in 2024

Official CMS public-use data for Sean J. Breslin, 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)362 services
2. Hospital discharge day management, more than 30 minutes (99239)125 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)86 services
4. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)83 services
5. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)38 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%
• Ischemic heart disease71%
• Arthritis69%
• Chronic kidney disease62%
• Diabetes58%

Hospitals where Sean J. Breslin works

Medicare's Facility Affiliation Data lists Sean J. Breslin 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.

• NYU Langone HospitalsNew York, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330214

Practice locations

Addresses where Sean J. Breslin is enrolled with Medicare (CMS data updated October 2, 2026).

• 550 1st AveNew York, NY 10016 (212) 263‑7300

Group practices

Medicare enrollment lists Sean J. Breslin as a member of this group (CMS data updated October 2, 2026).

• New York University6,134 clinicians in the group

Specialties

• Hospitalistprimary

Find other Hospitalist doctors in New York →

Other hospitalists in New York

Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.

• Matthew J. Kerwin, MD
• Andrew J. Mergl, MD
• Marilyn G. Chacko, DO
• Iris E. Bailey, MD
• Gregory L. Riley Ii, MD
• Jacob Spinner
• Jayne Nguyen, MD
• Francisco Alvarez, MD

All hospitalists in New York →

Other clinicians in New York University

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

• Alenny D. Mercado, NP
• Evelyn C. Dier, PA
• Jonathan Melamed, MD
• John Zampella, MD
• Myassar Zarif, MD
• Greg Sacks, 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