Mallory N Lesieur, MD - Medicare Internal Medicine in Boston, MA

Mallory N Lesieur, MD is a medicare enrolled "Internal Medicine - Pulmonary Disease" physician in Boston, Massachusetts. Her current practice location is 72 East Concord Street, R304, Boston, Massachusetts. You can reach out to her office (for appointments etc.) via phone at (617) 358-1340.

Mallory N Lesieur is licensed to practice in Massachusetts (license number 288044) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1154784510.

Contact Information

Mallory N Lesieur, MD
72 East Concord Street, R304,
Boston, MA 02118-2690
(617) 358-1340
(617) 358-1337

Map and Direction




Physician's Profile

Full NameMallory N Lesieur
GenderFemale
SpecialityInternal Medicine - Pulmonary Disease
Location72 East Concord Street, Boston, Massachusetts
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1154784510
  • Provider Enumeration Date: 04/03/2016
  • Last Update Date: 07/21/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 1557627072
  • Enrollment ID: I20230814000174

Medical Identifiers

Medical identifiers for Mallory N Lesieur such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1154784510NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 288044 (Massachusetts)Secondary
207RC0200XInternal Medicine - Critical Care Medicine 288044 (Massachusetts)Secondary
207RP1001XInternal Medicine - Pulmonary Disease 288044 (Massachusetts)Primary

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Mallory N Lesieur is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Mallory N Lesieur, MD
960 Massachusetts Ave, Fl 2,
Boston, MA 02118-2690

Ph: () -
Mallory N Lesieur, MD
72 East Concord Street, R304,
Boston, MA 02118-2690

Ph: (617) 358-1340

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

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