Lok Yun Sung, MD

Medicare activity in 2024

Official CMS public-use data for Lok Yun Sung, 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. Complete ultrasound scan behind abdominal cavity (76770)268 services
2. Ultrasound scan of head and neck soft tissue (76536)111 services
3. Limited ultrasound scan of abdomen (76705)96 services
4. Ct scan of abdomen and pelvis with contrast (74177)71 services
5. Complete ultrasound scan of abdomen (76700)70 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%
• Arthritis53%
• Ischemic heart disease49%
• Chronic kidney disease43%
• Diabetes41%

Hospitals where Lok Yun Sung works

Medicare's Facility Affiliation Data lists Lok Yun Sung 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.

• Suny/Stony Brook University HospitalStony Brook, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330393

Practice locations

Addresses where Lok Yun Sung is enrolled with Medicare (CMS data updated October 2, 2026).

• 100 Nicolls RdStony Brook, NY 11794 (631) 638‑2121
• 101 Nicolls RdStony Brook, NY 11794 (631) 444‑5400

Group practices

Medicare enrollment lists Lok Yun Sung as a member of this group (CMS data updated October 2, 2026).

• Stony Brook Radiology, University Faculty Practice Corporation59 clinicians in the group

Specialties

• Interventional Radiologyprimary
• Diagnostic Radiologyalso

Find other Interventional Radiology doctors in New York →

Other interventional radiologists in Stony Brook

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

• David J. Fiorella, MD
• Shoeb R. Chaudry, MD
• Kevin Klayman, DO
• Christopher M. Shackles, DO
• Valmore J. Suprenant, MD
• Andrew C. Maleson, MD
• John A. Ferretti, MD
• Daniel J. Ohngemach, MD

All interventional radiologists in Stony Brook →

Other clinicians in Stony Brook Radiology, University Faculty Practice Corporation

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

• Steven West, MD
• Marlene Zawin, MD
• Mahsa Hoshmand Kochi, MD
• Anton O. Beitia, MD
• Russ F. Saypoff, MD
• Sergey Kochkine, 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