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

Dr. Guy Lessard, O,D.

Optometrist in Manchester, NH · enumerated 2006.

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

National Provider Identifier

1083629943

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Registry record

Entity type Individual (Type 1)

Name Dr. Guy Lessard

Credential O,D.

Sex Male

Practice address Manchester, NH, 03103

Phone (603) 625-1774

Fax (603) 624-1530

Enumeration date Jul 29, 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

152W00000X Optometrist Eye and Vision Services Providers · License 578 (NH) Primary

152W00000X Optometrist Eye and Vision Services Providers · License 3646 (MA) Secondary

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

Is NPI 1083629943 active?

Yes, as of the latest NPPES snapshot, NPI 1083629943 is active (record last updated 2007-07-08).

How do I verify Guy Lessard's NPI record?

Cross-check NPI 1083629943 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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