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

Ms. Doireann Marie O'Brien, LPC

Mental Health Counselor in Columbia, MO · enumerated 2007.

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

National Provider Identifier

1477758621

Verified

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Registry record

Entity type Individual (Type 1)

Name Ms. Doireann Marie O'Brien

Credential LPC

Sex Female

Practice address Columbia, MO, 65203

Phone (573) 443-3888

Enumeration date Jun 18, 2007

Last updated in NPPES Jul 9, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers · License CS001391 (MO) Primary

LPC · Licensed Professional Counselor: A licensed mental-health counselor providing psychotherapy. About the LPC 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

Where does Doireann O'Brien practice?

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

What is the NPI number for Doireann O'Brien?

The National Provider Identifier (NPI) for Doireann O'Brien is 1477758621, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.