Mary Kathleen O'Keeffe, M.D.
NPI 1881945541ActiveIndividual· Internal Medicine, Hematology & Oncology· Mineola, NY
Internal Medicine, Hematology & Oncology (M.D.) with New York University, practicing in Mineola, New York. Their prescriptions cost Medicare Part D more than their services did: $7,492,467 for 1,083 claims, against $216,094 paid for services in 2024. Merck Sharp & Dohme LLC reported $3.77 in payments in 2025, mostly food and beverage. Lists NYU Langone Hospitals as a hospital affiliation.
Overview
| NPI | 1881945541 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 20, 2012 |
| Last updated in NPPES | Mar 10, 2021 |
| Certified by provider | Mar 10, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 266834 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 468 |
|---|---|
| Services billed | 2,862 across 27 procedure codes |
| Paid by Medicare | $216,094 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,083 · 1,377 30-day fills |
|---|---|
| Patients | 181 |
| Total drug cost | $7,492,467 |
| Generic share | 53% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- New York UniversityNew York, NY · 6,134 clinicians
Hospital affiliation
- NYU Langone HospitalsNew York, NY
Other facilities
- NYU Langone Home Health CareHome health agency · Garden City, NY
- Hospice Care of Long Island, Queens, South ShoreHospice · Woodbury, NY
Industry payments (Open Payments)
- 2025$3.77 · 1 payment from 1 company
- 2024$15.97 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $3.77 | 1 |
What the 2025 payments were for
- Food and Beverage$3.77 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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