Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mclean Gastroenterology, Pllc

Clinic/Center in Londonderry, NH · enumerated 2024 · authorized official Leon Mclean, President.

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

National Provider Identifier

1003622218

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Registry record

Entity type Organization (Type 2)

Legal business name Mclean Gastroenterology, Pllc

Practice address 50 Michels Way Unit 204, Londonderry, NH, 03053

Phone (617) 816-3738

Enumeration date Dec 4, 2024

Last updated in NPPES Dec 4, 2024

Taxonomy & classification

261Q00000X Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Leon Mclean

Title President

Phone (617) 816-3738

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

Where is Mclean Gastroenterology, Pllc located?

The practice location on file with NPPES is in Londonderry, NH.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2024-12-04. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-12-04.