Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Merrimack Valley Medical Associates, PC

Internal Medicine Physician in Methuen, MA · enumerated 2005 · authorized official Leo Lane, Owner.

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

National Provider Identifier

1114914868

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Registry record

Entity type Organization (Type 2)

Legal business name Merrimack Valley Medical Associates, PC

Practice address 421 Merrimack St, Suite 201, Methuen, MA, 01844

Phone (978) 725-4822

Fax (978) 725-5277

Enumeration date Sep 27, 2005

Last updated in NPPES Sep 28, 2021

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 155341 (MA) Primary

Authorized official

Name Leo Lane

Title Owner

Phone (978) 725-4822

Other identifiers

Identifier	Type	State	Issuer
2301962	Other	MA	AETNA US HEALTH
3208621	Medicaid	MA	-
50493	Other	MA	MATTHEW THORNTON
9593735010	Other	MA	CIGNA
504290	Other	MA	CIGNA HEALTHSOURCE
155341	Other	MA	TUFTS
69499	Other	MA	HARVARD PILGRIM
2301962	Other	MA	US HEALTH
49241	Other	MA	FALLON
504290	Other	MA	HEALTH SOURCE
M18024	Other	MA	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Merrimack Valley Medical Associates, PC?

Merrimack Valley Medical Associates, PC is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-28.