Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Rachel Bonenfant, LCSW

Social Worker in Waltham, MA · enumerated 2016.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1750731451

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Registry record

Entity type Individual (Type 1)

Name Rachel Bonenfant

Credential LCSW

Sex Female

Practice address 281 Winter St Ste 340, Waltham, MA, 02451

Phone (508) 996-3154

Enumeration date Jun 14, 2016

Last updated in NPPES Mar 22, 2023

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Secondary

104100000X Social Worker Behavioral Health & Social Service Providers · License 227854 (MA) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1750731451 active?

Yes, as of the latest NPPES snapshot, NPI 1750731451 is active (record last updated 2023-03-22).

How do I verify Rachel Bonenfant's NPI record?

Cross-check NPI 1750731451 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

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Vicki Kellam Social Worker · Waltham, MA NPI 1972686202 Judith Casarella Psychiatric/Mental Health Nurse Practitioner · Waltham, MA NPI 1528127750 Carson Byrne Psychologist · Waltham, MA NPI 1366960700 Faith Sudbey Clinical Social Worker · Waltham, MA NPI 1720541840 Elise Spintzyk Psychiatric/Mental Health Nurse Practitioner · Waltham, MA NPI 1710573753 Nicole Perez Elias Clinical Social Worker · Waltham, MA NPI 1114634870 Heather Boston Mental Health Counselor · Waltham, MA NPI 1497541338

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-22.