William S. Kass, MD
NPI 1104386218ActiveIndividual· Ophthalmology· New York, NY
Ophthalmology (MD) in New York, New York, trained at Rutgers New Jersey Medical School (class of 2019). Their prescriptions cost Medicare Part D more than their services did: $187,045 for 1,654 claims, against $8,799 paid for services in 2024. Astellas Pharma US Inc was the largest of 2 companies reporting payments in 2025, $44.59 in all, mostly food and beverage.
Overview
| NPI | 1104386218 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 24, 2019 |
| Last updated in NPPES | Jun 27, 2023 |
| Certified by provider | Jun 27, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 321874 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Ophthalmology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 44 |
|---|---|
| Services billed | 149 across 18 procedure codes |
| Paid by Medicare | $8,799 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,654 · 2,321 30-day fills |
|---|---|
| Patients | 325 |
| Total drug cost | $187,045 |
| Generic share | 57% of claims |
Education and affiliations
| Medical school | Rutgers New Jersey Medical School |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Ophthalmology |
Medical group
- Sajid Malik, MD PCNew York, NY · 9 clinicians
Industry payments (Open Payments)
- 2025$44.59 · 2 payments from 2 companies
- 2024$79.15 · 4 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astellas Pharma US Inc | $30.89 | 1 |
| Sun Pharmaceutical Industries Inc. | $13.70 | 1 |
What the 2025 payments were for
- Food and Beverage$44.59 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 714 ophthalmologists in New York · All ophthalmologists in New York