Lok Yun Sung, MD
NPI 1720221369 · Vascular & Interventional Radiology Physician · Stony Brook, NY
Enrolled with Medicare as Practitioner - Interventional Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lok Yun Sung, MD is a Vascular & Interventional Radiology Physician provider in Stony Brook, NY (NPI 1720221369).
Provider details
- NPI number
- 1720221369
- Entity type
- Individual
- Primary specialty
- Vascular & Interventional Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 268768 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,054 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Complete Ultrasound Scan Behind Abdominal Cavity76770 | 137 | $124 |
| Complete Ultrasound Scan Behind Abdominal Cavity76770 | 131 | $38 |
| Ultrasound Scan of Head and Neck Soft Tissue76536 | 83 | $128 |
| Limited Ultrasound Scan of Abdomen76705 | 82 | $30 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 71 | $93 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 47 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,661 across 34 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-04-13
- Last updated
- 2025-03-25
- Certified
- 2025-03-25
Frequently asked questions
- What is Lok Yun Sung's NPI number?
- Lok Yun Sung's National Provider Identifier (NPI) is 1720221369, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lok Yun Sung's specialty?
- Lok Yun Sung is listed in the NPPES registry with a primary specialty of Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Lok Yun Sung located?
- Lok Yun Sung's practice location on file with NPPES is 101 Nicolls Road, Department of Radiology, Stony Brook, NY 11794-8460.
- What is Lok Yun Sung's phone number?
- The practice phone number listed in the NPPES registry for Lok Yun Sung is (631) 444-7955.
- Does Lok Yun Sung accept Medicare?
- Lok Yun Sung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lok Yun Sung's NPI active?
- Yes — Lok Yun Sung's NPI (1720221369) is active in the NPPES registry as of the last update on 2025-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.