Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Liam G. Gannon, MD

Family Medicine Physician in Vergennes, VT · enumerated 2006.

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

National Provider Identifier

1780648691

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Registry record

Entity type Individual (Type 1)

Name Liam G. Gannon

Credential MD

Sex Male

Practice address 100a Macdonough Dr, Vergennes, VT, 05491

Phone (802) 877-0157

Enumeration date Apr 17, 2006

Last updated in NPPES Apr 16, 2024

Taxonomy & licenses

173000000X Legal Medicine Other Service Providers · License 0420010022 (VT) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 042-0010022 (VT) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
0VN2298	Medicaid	VT	-
OVN2298	Medicaid	VT	-

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 1780648691 active?

Yes, as of the latest NPPES snapshot, NPI 1780648691 is active (record last updated 2024-04-16).

How do I verify Liam Gannon's NPI record?

Cross-check NPI 1780648691 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 2024-04-16.