Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Holly Vassar, M.S., BCBA, LABA
Behavior Analyst in Newton, MA · enumerated 2012.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1780958223
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Holly Vassar
Credential M.S., BCBA, LABA
Sex Female
Practice address 109 Oak St, Newton, MA, 02464
Phone (603) 345-1142
Enumeration date Mar 1, 2012
Last updated in NPPES Aug 29, 2016
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
Is NPI 1780958223 active?
Yes, as of the latest NPPES snapshot, NPI 1780958223 is active (record last updated 2016-08-29).
How do I verify Holly Vassar's NPI record?
Cross-check NPI 1780958223 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Alanna Sieck Clinical Social Worker · Newton, MA NPI 1861685513 Ephat Russcol Pediatrics Physician · Newton, MA NPI 1598925356 Katherine Esposito Behavior Analyst · Newton, MA NPI 1104121672 Meghan Kane Clinical Social Worker · Newton, MA NPI 1659650588 Alyss Cavanagh Mental Health Counselor · Newton, MA NPI 1770837411 Morgan Burbank Behavior Analyst · Newton, MA NPI 1720423114 Integrated Learning Academy Newton Occupational Therapist · Newton, MA NPI 1043637655 Jessica Hache Behavior Analyst · Newton, MA NPI 1932508975
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-08-29.