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Loudoun Medical Group, PC

Internal Medicine Physician in Dulles, VA · enumerated 2024 · authorized official Mary Beth Tamasy, Ceo.

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

National Provider Identifier

1861248205

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Registry record

Entity type Organization (Type 2)
Legal business name Loudoun Medical Group, PC
Parent organization Loudoun Medical Group, PC
Practice address 24430 Stone Springs Blvd., Suite 100, Dulles, VA, 20166
Phone (703) 437-3850
Fax (703) 437-7888
Enumeration date Apr 26, 2024
Last updated in NPPES Apr 26, 2024

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Mary Beth Tamasy
Title Ceo
Phone (703) 737-6010

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 type of organization is Loudoun Medical Group, PC?
Loudoun Medical Group, PC is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).
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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-26.