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Dr. Paul John O'Brien, MD

Cardiovascular Disease Physician in Annandale, VA · enumerated 2006 · practices at Cardiology Specialists of Virginia.

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

National Provider Identifier

1992865588

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Registry record

Entity type Individual (Type 1)
Name Dr. Paul John O'Brien
Credential MD
Sex Male
Practice address 6715 Little River Tpke Ste 300, Annandale, VA, 22003
Phone (703) 751-6668
Fax (703) 642-1049
Enumeration date Dec 12, 2006
Last updated in NPPES Feb 7, 2022

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 0101055808 (VA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
010062802 Medicaid VA -
5164685 Other - AETNA
J4230001 Other - CAREFIRST

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.

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Frequently asked questions

What is the NPI number for Paul O'Brien?
The National Provider Identifier (NPI) for Paul O'Brien is 1992865588, a Type 1 (individual) record in the CMS NPPES registry.
Where does Paul O'Brien practice?
The practice location on file with NPPES is in Annandale, VA. 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 2022-02-07.