Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Loudoun Medical Group, PC

Internal Medicine Physician in Leesburg, VA · enumerated 2006 · authorized official Mary Beth Tamasy, Ceo.

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

National Provider Identifier

1679591440

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Registry record

Entity type Organization (Type 2)

Legal business name Loudoun Medical Group, PC

Practice address 224d Cornwall St Nw, Suite 403, Leesburg, VA, 20176

Phone (703) 737-6010

Fax (703) 443-8643

Enumeration date Jul 18, 2006

Last updated in NPPES Aug 18, 2023

Taxonomy & classification

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Secondary

207QS1201X Sleep Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians Secondary

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians Secondary

207VG0400X Gynecology Physician Allopathic & Osteopathic Physicians Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians Secondary

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians Secondary

2080P0206X Pediatric Gastroenterology Physician Allopathic & Osteopathic Physicians Secondary

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians Secondary

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Mary Beth Tamasy

Title Ceo

Phone (703) 737-6010

Other identifiers

Identifier	Type	State	Issuer
CG8678	Other	VA	RR MEDICARE GROUP
CG8679	Other	DC	RRMEDICARE
CG8680	Other	DC	RR MEDICARE DC
EC2891	Other	VA	RR MEDICARE PTAN 2023

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

Where is Loudoun Medical Group, PC located?

The practice location on file with NPPES is in Leesburg, VA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2023-08-18. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-18.