Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Cassidy Hayner
School Social Worker in Boston, MA · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1770217374
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Registry record
Entity type Individual (Type 1)
Name Cassidy Hayner
Sex Male
Practice address 184 High St, Boston, MA, 02110
Phone (866) 600-7598
Enumeration date Jul 11, 2022
Last updated in NPPES Jul 14, 2022
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
What specialty is Cassidy Hayner?
Cassidy Hayner is registered in NPPES with the primary taxonomy of School Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-14.