John Nathan Allan, M.D.
NPI 1144462441ActiveIndividual· Internal Medicine, Hematology & Oncology· New York, NY
Internal Medicine, Hematology & Oncology (M.D.) in New York, New York, trained at Saint Louis University School of Medicine (class of 2009). Their prescriptions cost Medicare Part D more than their services did: $1,527,035 for 268 claims, against $103,987 paid for services in 2024. Lilly USA, LLC was the largest of 13 companies reporting payments in 2025, $67,729 in all, mostly consulting fees.
Overview
| NPI | 1144462441 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 1, 2009 |
| Last updated in NPPES | Apr 17, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 264134 | NY |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Medical Oncology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 312 |
|---|---|
| Services billed | 1,010 across 19 procedure codes |
| Paid by Medicare | $103,987 |
Part D prescriptions in 2024
| Prescriptions (claims) | 268 · 363 30-day fills |
|---|---|
| Patients | 61 |
| Total drug cost | $1,527,035 |
| Generic share | 51% of claims |
Education and affiliations
| Medical school | Saint Louis University School of Medicine |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology |
| Telehealth | Offers telehealth |
Medical group
- Weill Medical College of CornellNew York, NY · 2,051 clinicians
Hospital affiliation
- New York-Presbyterian HospitalNew York, NY
Other facilities
- Girling Health Care of New YorkHome health agency · Brooklyn, NY
Industry payments (Open Payments)
- 2025$67,729 · 52 payments from 13 companies
- 2024$51,983 · 64 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $24,200 | 5 |
| Abbvie Inc. | $11,705 | 16 |
| Beone Medicines USA, Inc. | $8,105 | 11 |
| Astrazeneca Pharmaceuticals LP | $6,560 | 2 |
| Merck Sharp & Dohme LLC | $3,813 | 2 |
What the 2025 payments were for
- Consulting Fee$61,166 · 27 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$4,600 · 2 payments
- Food and Beverage$1,406 · 21 payments
- Travel and Lodging$557.54 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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