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

Mr. Gordon Alan Lang, MSW

School Social Worker in Watertown, MA · enumerated 2018.

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

National Provider Identifier

1659855690

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Registry record

Entity type Individual (Type 1)
Name Mr. Gordon Alan Lang
Credential MSW
Sex Male
Practice address Watertown, MA, 02472
Phone (617) 821-2933
Enumeration date Sep 15, 2018
Last updated in NPPES Sep 15, 2018

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

Taxonomy & licenses

1041S0200X School Social Worker Behavioral Health & Social Service Providers · License 113694-1 (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.

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Frequently asked questions

What is the NPI number for Gordon Lang?
The National Provider Identifier (NPI) for Gordon Lang is 1659855690, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gordon Lang practice?
The practice location on file with NPPES is in Watertown, MA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-09-15.