Julian J. Sonnenfeld, MD

Medicare activity in 2024

Official CMS public-use data for Julian J. Sonnenfeld, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)316 services
2. Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose (J7323)243 services
3. Aspiration and/or injection of fluid from large joint (20610)190 services
4. Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)180 services
5. Aspiration and/or injection of fluid large joint using ultrasound guidance (20611)135 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%
• Arthritis75%
• Diabetes38%
• Ischemic heart disease34%
• Anxiety29%

Hospitals where Julian J. Sonnenfeld works

Medicare's Facility Affiliation Data lists Julian J. Sonnenfeld 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
• St Charles HospitalPort Jefferson, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330246

Practice locations

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

• 8002 Kew Gardens RdKew Gardens, NY 11415 (718) 970‑6600

Group practices

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

• True North Medical Group PC188 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in New York →

Other orthopedic surgeons in Kew Gardens

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

• Dana L. Cruz, MD
• Joseph D. Munn, MD
• Abhishek Ganta, MD
• Michael A. Stracher, MD

All orthopedic surgeons in Kew Gardens →

Other clinicians in True North Medical Group PC

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

• Maurice D. Castillo
• Scott W. Alpert, MD
• Jaclyn M. Pappas
• Jules D. Hip-Flores, MD
• Salil Gupta, MD
• Patrick Leung, 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