Sara El Gassim, MD

Medicare activity in 2024

Official CMS public-use data for Sara El Gassim, 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)313 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)192 services
3. Hospital discharge day management, more than 30 minutes (99239)56 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)33 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%
• Arthritis68%
• Ischemic heart disease64%
• Chronic kidney disease47%
• Diabetes45%

Hospitals where Sara El Gassim works

Medicare's Facility Affiliation Data lists Sara El Gassim 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.

• Peconic Bay Medical CenterRiverhead, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330107

Practice locations

Addresses where Sara El Gassim is enrolled with Medicare (CMS data updated October 2, 2026).

• 1 Heroes WayRiverhead, NY 11901 (631) 548‑6101

Group practices

Medicare enrollment lists Sara El Gassim as a member of this group (CMS data updated October 2, 2026).

• Central Suffolk Hospital95 clinicians in the group

Specialties

• Hospitalistprimary

Find other Hospitalist doctors in New York →

Other hospitalists in Riverhead

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

• Elena D. Leonte, MD
• Navindra Ramharack, MD
• Shaikh J. Ahmed, MD
• Scott Hopkins, MD
• Vency J. Laurent, MD
• Nicolas Hernandez, MD
• Henok Regassa, MD
• Ramish Nasir, DO

All hospitalists in Riverhead →

Other clinicians in Central Suffolk Hospital

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

• Claudia Mangiamele, PA
• Elena D. Leonte, MD
• Navindra Ramharack, MD
• Kenneth J. Mayer, MD
• William G. Leverton Ii, NP
• Alexandria D. Moje, NP

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