Brenainn M. Flanagan, MD

Medicare activity in 2024

Official CMS public-use data for Brenainn M. Flanagan, 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)867 services
2. Hospital discharge day management, more than 30 minutes (99239)192 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)156 services
4. Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more (99308)94 services
5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)74 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%
• Arthritis66%
• Ischemic heart disease62%
• Anxiety44%
• Diabetes42%

Hospitals where Brenainn M. Flanagan works

Medicare's Facility Affiliation Data lists Brenainn M. Flanagan 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.

• North Shore University HospitalManhasset, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330106
• Northwell Hospital Glen CoveGlen Cove, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330181
• Plainview HospitalPlainview, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330331

Practice locations

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

• 101 Saint Andrews Ln, Suite 1Glen Cove, NY 11542 (516) 674‑1812

Group practices

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

• North Shore-Lij Medical PC6,440 clinicians in the group

Specialties

• Hospitalistprimary
• Family Practicealso

Find other Hospitalist doctors in New York →

Other hospitalists in Glen Cove

Clinicians with the same Medicare primary specialty in Glen Cove, NY — not a recommendation.

• Danielle Rosemond, MD
• Ambika Nath, DO
• Xian Li, MD
• Scott J. Bodner, MD
• Sonia Arneja, MD
• Wai C. Man, DO
• Fahad Riaz
• Goustina Adly, DO

All hospitalists in Glen Cove →

Other clinicians in North Shore-Lij Medical PC

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

• Elizabeth A. Owens, MD
• Brittany E. Ball, PA
• Blaine Greenwald, MD
• Daniel R. Landolphi, MD
• Cheska M. Mendoza, CSW
• Howard J. Goodman, 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