Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Michelle Masi
Behavior Analyst in Ronkonkoma, NY · enumerated 2024.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1043033020
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Registry record
Entity type Individual (Type 1)
Name Michelle Masi
Sex Female
Practice address 1 Hawkins Ave Unit 2411, Ronkonkoma, NY, 11779
Phone (631) 905-9464
Enumeration date Nov 6, 2024
Last updated in NPPES Nov 6, 2024
Taxonomy & licenses
103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 003883-01 (NY) 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 specialty is Michelle Masi?
Michelle Masi is registered in NPPES with the primary taxonomy of Behavior Analyst. 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.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-06.