Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Associates of Merrimack Valley Inc

Adolescent and Children Mental Health Clinic/Center in Chelmsford, MA · enumerated 2006 · authorized official Joel Siegel, President Coowner Codirector.

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

National Provider Identifier

1174536809

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Registry record

Entity type Organization (Type 2)

Legal business name Associates of Merrimack Valley Inc

Other name <Unavail>

Practice address 201 Chelmsford St, Chelmsford, MA, 01824

Phone (978) 256-1467

Fax (978) 256-7465

Enumeration date Aug 14, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & classification

261QM0850X Adult Mental Health Clinic/Center Ambulatory Health Care Facilities Secondary

261QM0855X Adolescent and Children Mental Health Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Joel Siegel

Title President Coowner Codirector

Phone (978) 256-1467

Other identifiers

Identifier	Type	State	Issuer
1018562	Other	-	CIGNA BEHAVIORAL HEALTH
306079	Other	-	MANAGED HEALTH NETWORK
1010500	Other	-	BEACON HEALTH STRATEGIES
W10410	Other	-	BCBS PSYCH
42682	Other	-	MAGELLON BEHAVIORAL HLTH
614070	Other	-	TUFTS HEALTH PLAN
CP0025	Other	-	BCBS RNCS
1102303	Medicaid	MA	-
111038	Other	-	BEHAVIORAL HEALTH NETWORK
M16842	Other	-	BLUE CROSS BLUE SHIELD

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.

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Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2025-09-11. Verify at npiregistry.cms.hhs.gov.

Where is Associates of Merrimack Valley Inc located?

The practice location on file with NPPES is in Chelmsford, MA.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.