Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Brennan, CRNA

Registered Nurse in Rockport, ME · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1023162328

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Registry record

Entity type Individual (Type 1)

Name Karen Brennan

Credential CRNA

Sex Female

Practice address 6 Glen Cove Dr, Rockport, ME, 04856

Phone (207) 921-8215

Fax (207) 921-5302

Enumeration date Jan 23, 2007

Last updated in NPPES May 10, 2016

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 158976 (MA) Primary

CRNA · Certified Registered Nurse Anesthetist: An advanced practice nurse specializing in anesthesia care. About the CRNA 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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Karen Brennan's NPI record?

Cross-check NPI 1023162328 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1023162328 active?

Yes, as of the latest NPPES snapshot, NPI 1023162328 is active (record last updated 2016-05-10).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-05-10.