Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Arielle S Horenstein, PHD
Clinical Psychologist in Boston, MA · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1659928240
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Registry record
Entity type Individual (Type 1)
Name Arielle S Horenstein
Credential PHD
Sex Female
Practice address 150 S Huntington Ave # 116b, Boston, MA, 02130
Phone (857) 364-6299
Enumeration date Aug 20, 2019
Last updated in NPPES Jan 24, 2023
Taxonomy & licenses
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 11992 (MA) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD 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.
Frequently asked questions
What is the NPI number for Arielle Horenstein?
The National Provider Identifier (NPI) for Arielle Horenstein is 1659928240, a Type 1 (individual) record in the CMS NPPES registry.
Where does Arielle Horenstein practice?
The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → William Simone-Skidmore Clinical Psychologist · Boston, MA NPI 1508022518 Blair Wisco Psychologist · Boston, MA NPI 1548557408 Diana Fitek Clinical Psychologist · Boston, MA NPI 1437408473 Laurel Brown Clinical Psychologist · Jamaica Plain, MA NPI 1851641245 Gina Poole Laposta Psychologist · Boston, MA NPI 1790280048 Rachel Shor Student in an Organized Health Care Education/Training Program · Jamaica Plain, MA NPI 1730756347 Allyson Mchugh Clinical Social Worker · Boston, MA NPI 1003507641
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-01-24.