Quick answers
- Does Mallory N. Lesieur accept Medicare assignment?
- Yes. Medicare's clinician data says Mallory N. Lesieur accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Mallory N. Lesieur see?
- In 2024, CMS data shows 173 Original Medicare patients and 368 services for Mallory N. Lesieur. This counts Original Medicare only and measures volume, not quality.
- What is Mallory N. Lesieur's NPI number?
- 1154784510. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Mallory N. Lesieur, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 173 |
|---|---|
| Services billed to Medicare | 368 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)131 services
- Critical care, first 30-74 minutes (99291)47 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)42 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)24 services
- Test to measure expiratory airflow and volume (94010)17 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure72%
- High cholesterol64%
- COPD57%
- Arthritis46%
- Asthma35%
- Anxiety34%
Hospitals where Mallory N. Lesieur works
Medicare's Facility Affiliation Data lists Mallory N. Lesieur at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Bridgton HospitalBridgton, ME · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 201310
- Central Maine Medical CenterLewiston, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200024
- Rumford HospitalRumford, ME · Critical Access Hospital · Emergency services: listed by Medicare · CCN 201306
- St Mary's Regional Medical CenterLewiston, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200034
Practice locations
Addresses where Mallory N. Lesieur is enrolled with Medicare (CMS data updated October 2, 2026).
Group practices
Medicare enrollment lists Mallory N. Lesieur as a member of this group (CMS data updated October 2, 2026).
- Central Maine Medical Center342 clinicians in the group
Specialties
Other pulmonologists in Lewiston
Clinicians with the same Medicare primary specialty in Lewiston, ME — not a recommendation.
Other clinicians in Central Maine Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1154784510 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians