Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Constance K Breen, NP
Nurse Practitioner in Andover, MA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1396947636
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Registry record
Entity type Individual (Type 1)
Name Mrs. Constance K Breen
Credential NP
Sex Female
Practice address 323 Lowell St Ste 302, Andover, MA, 01810
Phone (978) 475-3502
Enumeration date May 31, 2007
Last updated in NPPES Jul 21, 2022
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 135088 (MA) Primary
NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority.
About the NP credential
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 Constance Breen?
The National Provider Identifier (NPI) for Constance Breen is 1396947636, a Type 1 (individual) record in the CMS NPPES registry.
Where does Constance Breen practice?
The practice location on file with NPPES is in Andover, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Sue Kim Obstetrics & Gynecology Physician · Andover, MA NPI 1629061247 Abby Duclos Obstetrics & Gynecology Physician · Andover, MA NPI 1841267390 Michelle Young Obstetrics & Gynecology Nurse Practitioner · Andover, MA NPI 1790876175 Kaitlan Ahrens Surgery Physician · Andover, MA NPI 1073976650 David Ma Surgery Physician · Andover, MA NPI 1659722312 Gabrielle Zweig Physician Assistant · Andover, MA NPI 1558977868 Sarah Yanulis Family Nurse Practitioner · Andover, MA NPI 1073363172
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.