Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Sierra Danielle Leek, BCBA
Behavior Analyst in Braintree, MA · enumerated 2026.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1871415414
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Registry record
Entity type Individual (Type 1)
Name Sierra Danielle Leek
Credential BCBA
Sex Female
Practice address 220 Forbes Rd Ste 1120, Braintree, MA, 02184
Phone (617) 322-2694
Enumeration date Jul 27, 2026
Last updated in NPPES Jul 27, 2026
Taxonomy & licenses
103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 1-26-90020 (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 Sierra Leek?
The National Provider Identifier (NPI) for Sierra Leek is 1871415414, a Type 1 (individual) record in the CMS NPPES registry.
Where does Sierra Leek practice?
The practice location on file with NPPES is in Braintree, MA. 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 2026-07-27.