Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mark Breen
Specialist in Lowell, MA · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1003483678
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Registry record
Entity type Individual (Type 1)
Name Mark Breen
Sex Male
Practice address 1230 Bridge St, Lowell, MA, 01850
Phone (978) 455-3397
Enumeration date Jun 10, 2021
Last updated in NPPES Jun 10, 2021
Taxonomy & licenses
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What is the NPI number for Mark Breen?
The National Provider Identifier (NPI) for Mark Breen is 1003483678, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Breen practice?
The practice location on file with NPPES is in Lowell, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → John Capino Ophthalmology Physician · Lowell, MA NPI 1730147612 David Lezberg Emergency Medicine Physician · Lowell, MA NPI 1356396519 Saints Memorial Center Walk in Health Service Clinic/Center · Lowell, MA NPI 1205934528 Tanya Brown Physician Assistant · Lowell, MA NPI 1962502443 Marie Dupic-Washburn Emergency Medicine Physician · Lowell, MA NPI 1619030640 Marcia Panico Adult Health Nurse Practitioner · Lowell, MA NPI 1396860235 John Capino,Mdpc Durable Medical Equipment & Medical Supplies · Lowell, MA NPI 1942422555 John Capino, MD PC Specialist · Lowell, MA NPI 1881891885
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-10.