Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Henry Sherry, LMSW

Social Worker in Potsdam, NY · enumerated 2019.

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

National Provider Identifier

1891250460

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Registry record

Entity type Individual (Type 1)

Name Mark Henry Sherry

Credential LMSW

Sex Male

Practice address 12 Elm St, Potsdam, NY, 13676

Phone (315) 353-2572

Enumeration date Feb 7, 2019

Last updated in NPPES Feb 7, 2019

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 105630 (NY) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Mark Sherry's NPI record?

Cross-check NPI 1891250460 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1891250460 active?

Yes, as of the latest NPPES snapshot, NPI 1891250460 is active (record last updated 2019-02-07).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-02-07.