Jonathan A. Garellek, DO

Medicare activity in 2024

Official CMS public-use data for Jonathan A. Garellek, 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)424 services
2. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)115 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)46 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)41 services
5. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)37 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%
• Diabetes63%
• Ischemic heart disease56%
• Chronic kidney disease52%

Hospitals where Jonathan A. Garellek works

Medicare's Facility Affiliation Data lists Jonathan A. Garellek 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.

• Long Island Jewish Medical CenterNew Hyde Park, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330195
• Northwell Hospital Glen CoveGlen Cove, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330181

Practice locations

Addresses where Jonathan A. Garellek is enrolled with Medicare (CMS data updated October 2, 2026).

• 900 Franklin AveValley Stream, NY 11580 (516) 256‑6000

Group practices

Medicare enrollment lists Jonathan A. Garellek as a member of this group (CMS data updated October 2, 2026).

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

Specialties

• Infectious Diseaseprimary

Find other Infectious Disease doctors in New York →

Other infectious disease doctors in New York

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

• Joseph H. Paul, MD
• Angela R. Branche, MD
• Gil Redelman-Sidi, MD
• Ann R. Falsey, MD
• Valida Bajrovic, MD
• Daniel M. Soule, DO
• Mary C. Masters, MD
• George Alonso, MD

All infectious disease doctors in New York →

Other clinicians in North Shore-Lij Medical PC

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

• Julianna Noto, PA
• Erik G. Walter, PA
• Andre J. Reyes, MD
• Javier O. Garcia, MD
• Gillian H. Levy, MD
• Alisha Mattondo

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