Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Casey M O'Brien, PA-C

Physician Assistant in Williston, VT · enumerated 2020.

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

National Provider Identifier

1073133484

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Registry record

Entity type Individual (Type 1)

Name Casey M O'Brien

Credential PA-C

Sex Male

Practice address 426 Industrial Ave Ste 130, Williston, VT, 05495

Phone (802) 878-1175

Fax (802) 652-5355

Enumeration date Apr 26, 2020

Last updated in NPPES Jan 13, 2026

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 055.0031747 (VT) 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.

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Frequently asked questions

How do I verify Casey O'Brien's NPI record?

Cross-check NPI 1073133484 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1073133484 active?

Yes, as of the latest NPPES snapshot, NPI 1073133484 is active (record last updated 2026-01-13).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-01-13.