Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Erin J Brennen, ATC
Specialist in Chestnut Hill, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1477514685
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Erin J Brennen
Credential ATC
Sex Female
Practice address 400 Heath St, Chestnut Hill, MA, 02467
Phone (617) 731-7057
Fax (617) 731-7035
Enumeration date Mar 29, 2006
Last updated in NPPES Jul 8, 2007
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
Is NPI 1477514685 active?
Yes, as of the latest NPPES snapshot, NPI 1477514685 is active (record last updated 2007-07-08).
How do I verify Erin Brennen's NPI record?
Cross-check NPI 1477514685 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.