Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Michelle Ann O'Brien, D.O.

Psychiatry Physician in Fort Collins, CO · enumerated 2015.

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

National Provider Identifier

1144601618

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Registry record

Entity type Individual (Type 1)

Name Ms. Michelle Ann O'Brien

Credential D.O.

Sex Female

Practice address 2260 W Trilby Rd, Fort Collins, CO, 80526

Phone (970) 494-4200

Fax (844) 270-1824

Enumeration date Jun 10, 2015

Last updated in NPPES Jul 16, 2025

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License DR.0075316 (CO) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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

What is the NPI number for Michelle O'Brien?

The National Provider Identifier (NPI) for Michelle O'Brien is 1144601618, a Type 1 (individual) record in the CMS NPPES registry.

Where does Michelle O'Brien practice?

The practice location on file with NPPES is in Fort Collins, CO. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-16.