Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Miss Alfred G O'Brien, PA-C

Physician Assistant in Butte, MT · enumerated 2006.

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

National Provider Identifier

1801994504

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Registry record

Entity type Individual (Type 1)

Name Miss Alfred G O'Brien

Credential PA-C

Sex Male

Practice address 445 Centennial Ave, Butte, MT, 59701

Phone (406) 723-4075

Enumeration date Sep 20, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 30 (MT) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Alfred O'Brien?

The National Provider Identifier (NPI) for Alfred O'Brien is 1801994504, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alfred O'Brien practice?

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

Other providers at this practice address

Browse all →

Michael Stuart General Practice Dentistry · Butte, MT NPI 1669478772 Catherine White Pediatrics Physician · Butte, MT NPI 1003804998 Jennifer Miranda Pharmacist · Butte, MT NPI 1588655088 Tammy Cox Pharmacist · Butte, MT NPI 1841259330 Scott Olsen General Practice Dentistry · Butte, MT NPI 1841215167 Harold Bruce Nurse Practitioner · Butte, MT NPI 1750488789 Ruth Lee Physician Assistant · Butte, MT NPI 1285731133 Dayna Thergesen Pediatric Nurse Practitioner · Butte, MT NPI 1831296706

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.