Vivien Leung, MD
NPI 1598928160 · Endocrinology, Diabetes & Metabolism Physician · Bronx, NY
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivien Leung, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Bronx, NY (NPI 1598928160).
Provider details
- NPI number
- 1598928160
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 003124 (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
101 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 89 | $108 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 12 | $146 |
Typical Medicare-allowed amounts for these services range $108–$146 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 83 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 775 | 146 |
| Metformin Hcl | 522 | 171 |
| Levothyroxine Sodium | 428 | 124 |
| Dulaglutidebrand: Trulicity | 397 | 81 |
| Empagliflozinbrand: Jardiance | 333 | 89 |
| Insulin Aspartbrand: Novolog Flexpen | 329 | 81 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$476 across 12 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
- 2008-07-03
- Last updated
- 2014-01-02
Frequently asked questions
- What is Vivien Leung's NPI number?
- Vivien Leung's National Provider Identifier (NPI) is 1598928160, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivien Leung's specialty?
- Vivien Leung is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Vivien Leung located?
- Vivien Leung's practice location on file with NPPES is 1650 Grand Concourse, Bronx, NY 10457-7606.
- What is Vivien Leung's phone number?
- The practice phone number listed in the NPPES registry for Vivien Leung is (718) 590-1800.
- Does Vivien Leung accept Medicare?
- Vivien Leung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivien Leung's NPI active?
- Yes — Vivien Leung's NPI (1598928160) is active in the NPPES registry as of the last update on 2014-01-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.