NPIMap

Organization Active NPI

Loudoun Medical Group, PC

Doing business as Loudoun Pulmonary and Sleep Medicine

  • Pulmonary Disease Physician
  • Potomac Falls, VA
National Provider Identifier
1124982319
Registry record updated Dec 11, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Pulmonary Disease PhysicianTaxonomy code 207RP1001X
Legal business name
LOUDOUN MEDICAL GROUP, PC
Doing business as
Loudoun Pulmonary and Sleep Medicine
Practice address
46090 Lake Center Plaza, Suite 201
Potomac Falls, VA 20165-5878
Phone
(703) 723-7504
Fax
(703) 723-7550
NPI assigned
Dec 11, 2025
Last updated
Dec 11, 2025By the provider in NPPES
Organization subpart
Yes
Parent organization
LOUDOUN MEDICAL GROUP, PCAs reported in NPPES

NPPES NPI Registry

Updated by the provider on Dec 11, 2025

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Pulmonary Disease Physician 207RP1001X NU Primary

Addresses

Primary practice location

46090 Lake Center Plaza, Suite 201
Potomac Falls, VA 20165-5878

Mailing address

224-D Cornwall Street, NW., Suite 403
Leesburg, VA 20176-2704
Phone (703) 737-6010

Other names 1

  • Loudoun Pulmonary and Sleep Medicine Doing business as

National Provider Directory

National Provider Directory
Tax ID family
Loudoun Medical Group P305 organizations share this tax ID, including this one
Part of
Loudoun Medical Group P

Organizations with this tax ID in the same state 24

This tax ID family is large, so up to 24 of its organizations in the same state are linked here.

View all 24

Ownership & related parties

Parent organization (reported in NPPES) 1

This organization reports itself as a subpart in NPPES; the parent’s legal name matches this organization in the same state.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1765411200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1765411200000",
    "number": "1124982319",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "224-D CORNWALL STREET, NW., SUITE 403",
            "city": "LEESBURG",
            "state": "VA",
            "postal_code": "201762704",
            "telephone_number": "703-737-6010"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "46090 LAKE CENTER PLAZA, SUITE 201",
            "city": "POTOMAC FALLS",
            "state": "VA",
            "postal_code": "201655878",
            "telephone_number": "703-723-7504",
            "fax_number": "703-723-7550"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "LOUDOUN MEDICAL GROUP, PC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "LOUDOUN MEDICAL GROUP, PC",
        "enumeration_date": "2025-12-11",
        "last_updated": "2025-12-11",
        "certification_date": "2025-12-11",
        "status": "A",
        "authorized_official_last_name": "TAMASY",
        "authorized_official_first_name": "MARY BETH",
        "authorized_official_title_or_position": "CEO",
        "authorized_official_telephone_number": "703-737-6010"
    },
    "taxonomies": [
        {
            "code": "207RP1001X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Pulmonary Disease",
            "state": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Loudoun Pulmonary and Sleep Medicine",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Potomac Falls, VA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.