Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ellen Patricia O'Connor, RN
Registered Nurse in Arlington, MA · enumerated 2015.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1881064558
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Registry record
Entity type Individual (Type 1)
Name Ellen Patricia O'Connor
Credential RN
Sex Female
Practice address 66 Dow Ave, Arlington, MA, 02476
Phone (781) 648-0374
Enumeration date Oct 6, 2015
Last updated in NPPES Oct 6, 2015
Taxonomy & licenses
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam.
About the RN 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 Ellen O'Connor?
The National Provider Identifier (NPI) for Ellen O'Connor is 1881064558, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ellen O'Connor practice?
The practice location on file with NPPES is in Arlington, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-10-06.