John Mascarenhas, MD
NPI 1376719104ActiveIndividual· Internal Medicine, Hematology & Oncology· New York, NY
Internal Medicine, Hematology & Oncology (MD) in New York, New York, trained at New York Medical College (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $3,117,469 for 511 claims, against $54,967 paid for services in 2024. Incyte Corporation was the largest of 14 companies reporting payments in 2025, $65,194 in all, mostly consulting fees.
Overview
| NPI | 1376719104 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | May 1, 2008 |
| Last updated in NPPES | Jul 7, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 235966 | 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 - Hematology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 197 |
|---|---|
| Services billed | 657 across 14 procedure codes |
| Paid by Medicare | $54,967 |
Part D prescriptions in 2024
| Prescriptions (claims) | 511 · 649 30-day fills |
|---|---|
| Patients | 89 |
| Total drug cost | $3,117,469 |
| Generic share | 57% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Hematology |
Medical group
- Icahn School of Medicine at Mount SinaiNew York, NY · 2,843 clinicians
Hospital affiliations
- Mount Sinai Beth IsraelNew York, NY
- Mount Sinai HospitalNew York, NY
- Mount Sinai South NassauOceanside, NY
Other facilities
- Vns of Ny Home Care ChhaHome health agency · New York, NY
Industry payments (Open Payments)
- 2025$65,194 · 53 payments from 14 companies
- 2024$148,567 · 91 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Incyte Corporation | $20,956 | 13 |
| Sumitomo Pharma America, Inc. | $13,981 | 4 |
| Geron Corporation | $8,298 | 7 |
| Karyopharm Therapeutics Inc. | $7,246 | 5 |
| Sobi, Inc | $5,785 | 4 |
What the 2025 payments were for
- Consulting Fee$55,010 · 21 payments
- Travel and Lodging$5,989 · 3 payments
- Honoraria$2,400 · 1 payment
- Food and Beverage$1,795 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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