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

Mari Suzanne O'Brien, RN

Q: What is the NPI number for Mari O'Brien?

The National Provider Identifier (NPI) for Mari O'Brien is 1154156297, a Type 1 (individual) record in the CMS NPPES registry.

Registered Nurse in Boerne, TX · enumerated 2024.

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

National Provider Identifier

1154156297

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mari Suzanne O'Brien

Credential RN

Sex Female

Practice address Boerne, TX, 78006

Phone (210) 488-2793

Enumeration date Sep 6, 2024

Last updated in NPPES Sep 6, 2024

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

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 526470 (TX) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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 Mari O'Brien practice?

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

What is the NPI number for Mari O'Brien?

The National Provider Identifier (NPI) for Mari O'Brien is 1154156297, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-06.