Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Nancy J O'Connor, N.P
Registered Nurse in Hyannis, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164459285
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Registry record
Entity type Individual (Type 1)
Name Nancy J O'Connor
Credential N.P
Sex Female
Practice address 25 Main Street, The Cardiovascular Specialists, LLC, Hyannis, MA, 02601
Phone (508) 778-1829
Fax (508) 778-0113
Enumeration date Jun 26, 2006
Last updated in NPPES Mar 7, 2023
Taxonomy & licenses
NP · Nurse Practitioner: An advanced practice registered nurse with graduate training, licensed to diagnose and treat, often with prescriptive authority.
About the NP credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| NP091501 | Other | MA | MEDICARE |
| 16458 | Other | MA | NP LICENSE # |
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
Where does Nancy O'Connor practice?
The practice location on file with NPPES is in Hyannis, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Nancy O'Connor?
The National Provider Identifier (NPI) for Nancy O'Connor is 1164459285, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.