Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mary T. O'Brien, MD, Plc

Q: What type of organization is Mary T. O'Brien, MD, Plc?

Mary T. O'Brien, MD, Plc is registered in NPPES as a Family Medicine Physician (its primary provider taxonomy).

Family Medicine Physician in Staunton, VA · enumerated 2007 · authorized official Mary O'Brien, Owner.

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

National Provider Identifier

1669501466

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Mary T. O'Brien, MD, Plc

Practice address 422 Commerce Rd, Staunton, VA, 24401

Phone (540) 886-6086

Fax (540) 886-6918

Enumeration date Mar 5, 2007

Last updated in NPPES Jan 16, 2008

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 0101017504 (VA) Primary

Authorized official

Name Mary O'Brien

Title Owner

Phone (540) 886-6086

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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Mary T. O'Brien, MD, Plc?

Mary T. O'Brien, MD, Plc is registered in NPPES as a Family Medicine Physician (its primary provider taxonomy).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-16.