Mallory N. Lesieur, M.D.
NPI 1154784510ActiveIndividual· Internal Medicine, Pulmonary Disease· Boston, MA
Internal Medicine, Pulmonary Disease (M.D.) with Central Maine Medical Center, practicing in Boston, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $560,200 for 1,030 claims, against $25,974 paid for services in 2024. Genzyme Corporation reported $37.05 in payments in 2025, mostly food and beverage. Lists Bridgton Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1154784510 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 3, 2016 |
| Last updated in NPPES | Jul 21, 2023 |
| Certified by provider | Jul 21, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 288044 | MA |
| Internal Medicine | 207R00000X | 288044 | MA |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 288044 | MA |
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 - Pulmonary Disease (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 173 |
|---|---|
| Services billed | 368 across 23 procedure codes |
| Paid by Medicare | $25,974 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,030 · 1,691 30-day fills |
|---|---|
| Patients | 258 |
| Total drug cost | $560,200 |
| Generic share | 42% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
Medical group
- Central Maine Medical CenterLewiston, ME · 342 clinicians
Hospital affiliations
- Bridgton HospitalBridgton, ME
- Central Maine Medical CenterLewiston, ME
- Rumford HospitalRumford, ME
- St Mary's Regional Medical CenterLewiston, ME
Industry payments (Open Payments)
- 2025$37.05 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $37.05 | 1 |
What the 2025 payments were for
- Food and Beverage$37.05 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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