Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Allen Cannon, LMSW

Social Worker in Rochester, NY · enumerated 2021.

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

National Provider Identifier

1821682220

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Registry record

Entity type Individual (Type 1)

Name William Allen Cannon

Credential LMSW

Sex Male

Practice address 224 Alexander St Ste 100, Rochester, NY, 14607

Phone (585) 922-9900

Enumeration date Feb 25, 2021

Last updated in NPPES Feb 23, 2024

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 092537-01 (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 William Cannon's NPI record?

Cross-check NPI 1821682220 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821682220 active?

Yes, as of the latest NPPES snapshot, NPI 1821682220 is active (record last updated 2024-02-23).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-23.