Leigh Kwak, M.D.
NPI 1548614977ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· White Plains, NY
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) with White Plains Physician Services PC, practicing in White Plains, New York. Their prescriptions cost Medicare Part D more than their services did: $1,076,230 for 1,499 claims, against $64,175 paid for services in 2024. Lilly USA, LLC was the largest of 13 companies reporting payments in 2025, $632.24 in all, mostly food and beverage. Lists White Plains Hospital Center as a hospital affiliation.
Overview
| NPI | 1548614977 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 21, 2016 |
| Last updated in NPPES | Aug 23, 2021 |
| Certified by provider | Aug 23, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 311983 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 246 |
|---|---|
| Services billed | 1,024 across 18 procedure codes |
| Paid by Medicare | $64,175 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,499 · 3,378 30-day fills |
|---|---|
| Patients | 227 |
| Total drug cost | $1,076,230 |
| Generic share | 41% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- White Plains Physician Services PCHarrison, NY · 386 clinicians
Hospital affiliation
- White Plains Hospital CenterWhite Plains, NY
Industry payments (Open Payments)
- 2025$632.24 · 28 payments from 13 companies
- 2024$507.75 · 24 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $136.47 | 6 |
| Kyowa Kirin, Inc. | $94.56 | 4 |
| Novo Nordisk Inc | $88.82 | 4 |
| Abbvie Inc. | $76.62 | 3 |
| Calliditas Therapeutics US Inc. | $50.52 | 2 |
What the 2025 payments were for
- Food and Beverage$632.24 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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