Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Brittany Hayes
Behavior Analyst in Darien, CT · enumerated 2020.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1639707870
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Registry record
Entity type Individual (Type 1)
Name Brittany Hayes
Sex Female
Practice address 30 Old Kings Hwy S Fl 2, Darien, CT, 06820
Phone (888) 754-0398
Enumeration date Apr 1, 2020
Last updated in NPPES May 2, 2022
Taxonomy & licenses
103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 3991 (MA) Primary
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 Brittany Hayes?
The National Provider Identifier (NPI) for Brittany Hayes is 1639707870, a Type 1 (individual) record in the CMS NPPES registry.
Where does Brittany Hayes practice?
The practice location on file with NPPES is in Darien, CT. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-02.