Zachariah Defilipp, M.D.
NPI 1851601264ActiveIndividual· Internal Medicine, Hematology & Oncology· Atlanta, GA
Internal Medicine, Hematology & Oncology (M.D.) with Massachusetts General Physicians Organization Inc and 1 other group, practicing in Atlanta, Georgia. Their prescriptions cost Medicare Part D more than their services did: $1,006,394 for 255 claims, against $50,056 paid for services in 2024. Therakos LLC was the largest of 6 companies reporting payments in 2025, $21,877 in all, mostly consulting fees. Lists Brigham and Women's Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1851601264 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 19, 2010 |
| Last updated in NPPES | Jan 3, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 006643 | GA |
| Internal Medicine | 207R00000X | MT198167 | PA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Medical Oncology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 86 |
|---|---|
| Services billed | 601 across 9 procedure codes |
| Paid by Medicare | $50,056 |
Part D prescriptions in 2024
| Prescriptions (claims) | 255 · 343 30-day fills |
|---|---|
| Patients | 48 |
| Total drug cost | $1,006,394 |
| Generic share | 66% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology |
| Telehealth | Offers telehealth |
Medical groups
- Massachusetts General Physicians Organization IncBoston, MA · 3,558 clinicians
- The General Hospital CorporationBoston, MA · 1,267 clinicians
Hospital affiliations
- Brigham and Women's HospitalBoston, MA
- Massachusetts General HospitalBoston, MA
Other facilities
- Mass General Brigham Home Care, IncHome health agency · Newton, MA
Industry payments (Open Payments)
- 2025$21,877 · 7 payments from 6 companies
- 2024$16,789 · 8 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Therakos LLC | $7,444 | 1 |
| Syndax Pharmaceuticals, Inc. | $7,200 | 2 |
| Mesoblast, Inc. | $3,125 | 1 |
| Aimmune Therapeutics, Inc. | $2,800 | 1 |
| Sanofi US Services Inc. | $841.00 | 1 |
What the 2025 payments were for
- Consulting Fee$14,433 · 6 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$7,444 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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