Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. Marc J. Aronoff, LMHC

Q: What is the NPI number for Marc Aronoff?

The National Provider Identifier (NPI) for Marc Aronoff is 1174791834, a Type 1 (individual) record in the CMS NPPES registry.

Counselor in Lenox, MA · enumerated 2008.

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

National Provider Identifier

1174791834

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. Marc J. Aronoff

Credential LMHC

Sex Male

Practice address Lenox, MA, 01240

Phone (413) 637-3512

Enumeration date Feb 15, 2008

Last updated in NPPES Feb 15, 2008

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers · License 4705 (MA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Marc Aronoff?

The National Provider Identifier (NPI) for Marc Aronoff is 1174791834, a Type 1 (individual) record in the CMS NPPES registry.

Where does Marc Aronoff practice?

The practice location on file with NPPES is in Lenox, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-02-15.