Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Loudoun Medical Group, PC

Q: What is the NPI number for Loudoun Medical Group, PC?

The NPI for Loudoun Medical Group, PC is 1427243930, a Type 2 (organization) record in the CMS NPPES registry.

Pediatrics Physician in Sterling, VA · enumerated 2007 · authorized official Mary Beth Tamasy, Ceo.

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

National Provider Identifier

1427243930

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Registry record

Entity type Organization (Type 2)

Legal business name Loudoun Medical Group, PC

Other name <Unavail>

Parent organization Loudoun Medical Group, PC

Practice address 46440 Benedict Drive, Suite 207, Sterling, VA, 20164

Phone (703) 444-2100

Fax (703) 444-0386

Enumeration date Sep 7, 2007

Last updated in NPPES Apr 24, 2023

Taxonomy & classification

208000000X Pediatrics 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Loudoun Medical Group, PC?

The NPI for Loudoun Medical Group, PC is 1427243930, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Loudoun Medical Group, PC?

NPPES lists Mary Beth Tamasy (Ceo) as the authorized official for this organization.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-04-24.