NPI Portal NPI Lookup & Verification

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

Ms. Stacy Reed Mason, LMSW

Clinical Social Worker in Brewster, NY · enumerated 2006.

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

National Provider Identifier

1851452361

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Registry record

Entity type Individual (Type 1)
Name Ms. Stacy Reed Mason
Credential LMSW
Sex Female
Practice address Brewster, NY, 10509
Phone (845) 216-0388
Enumeration date Dec 12, 2006
Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 056109 (NY) Primary

Other identifiers

Identifier Type State Issuer
P3494229 Other NY OXFORD PROVIDER ID

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

Is NPI 1851452361 active?
Yes, as of the latest NPPES snapshot, NPI 1851452361 is active (record last updated 2007-07-08).
How do I verify Stacy Mason's NPI record?
Cross-check NPI 1851452361 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.