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Mason Street Industries LLC

Neurology Physician in Greenwich, CT · enumerated 2025 · authorized official David Hahn, President.

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

National Provider Identifier

1215805536

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Registry record

Entity type Organization (Type 2)
Legal business name Mason Street Industries LLC
Practice address 115 Mason St Ste 1, Greenwich, CT, 06830
Phone (718) 514-0224
Enumeration date Oct 28, 2025
Last updated in NPPES Oct 28, 2025

Taxonomy & classification

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name David Hahn
Title President
Phone (718) 514-0224

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

Where is Mason Street Industries LLC located?
The practice location on file with NPPES is in Greenwich, CT.
How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2025-10-28. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-28.