Marianna Koss, PA
NPI 1902993561ActiveIndividual· Physician Assistant, Medical· New York, NY
Physician Assistant, Medical (PA) with Maimonides Faculty Practice Plan, practicing in New York, New York. Their prescriptions cost Medicare Part D more than their services did: $21,627 for 129 claims, against $7,297 paid for services in 2024. Verona Pharma, Inc. was the largest of 16 companies reporting payments in 2025, $1,822 in all, mostly food and beverage.
Overview
| NPI | 1902993561 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | Yes |
| NPI issued | Oct 6, 2006 |
| Last updated in NPPES | Mar 18, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Medical Primary | 363AM0700X | 006256-1 | 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 - Physician Assistant (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 83 |
|---|---|
| Services billed | 187 across 12 procedure codes |
| Paid by Medicare | $7,297 |
Part D prescriptions in 2024
| Prescriptions (claims) | 129 · 145 30-day fills |
|---|---|
| Patients | 37 |
| Total drug cost | $21,627 |
| Generic share | 71% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Maimonides Faculty Practice PlanBrooklyn, NY · 252 clinicians
Industry payments (Open Payments)
- 2025$1,822 · 59 payments from 16 companies
- 2024$1,522 · 55 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Verona Pharma, Inc. | $290.75 | 10 |
| Actelion Pharmaceuticals US, Inc. | $213.93 | 5 |
| Scpharmaceuticals Inc. | $182.28 | 3 |
| Novartis Pharmaceuticals Corporation | $168.98 | 6 |
| Merck Sharp & Dohme LLC | $155.76 | 7 |
What the 2025 payments were for
- Food and Beverage$1,722 · 58 payments
- Education$99.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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