NPIMap

Individual provider Active NPI

Michael Stephen Londner, MD

  • Emergency Medicine Physician
  • Leesburg, VA
National Provider Identifier
1346298700
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Emergency Medicine PhysicianTaxonomy code 207P00000X
License
0101237389 Issued in VA
Practice address
44045 Riverside Parkway
Loudoun Hospital Center
Leesburg, VA 20176
Phone
(703) 858-6040
Fax
(610) 617-6280
NPI assigned
May 5, 2006
Last updated
Jul 13, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Emergency Medicine Physician 207P00000X 0101237389 VA Primary

Addresses

Primary practice location

44045 Riverside Parkway
Loudoun Hospital Center
Leesburg, VA 20176

Mailing address

PO Box 13700-1369
Commonwealth Emergency Physicians PC
Philadelphia, PA 19191-1369
Phone (800) 666-2455

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WV
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20120228000005 WV Practitioner - Emergency Medicine 6608822291 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare

Merit-based Incentive Payment System (MIPS)

Final score
95.34 of 100Reported as apm
Quality
79.86
Promoting interoperability
100
Improvement activities
40

Merit-based Incentive Payment System (MIPS)

Final score
95.34 of 100Reported as apm
Quality
79.86
Promoting interoperability
100
Improvement activities
40

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
0101237389VAMDEmergency Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Jefferson Memorial Hospital CurrentSince Jun 30, 2022 Accepting new patients
Jefferson Memorial Hospital CurrentSince Jun 30, 2022 Accepting new patients
City Hospital, Inc. Emergency Medicine CurrentSince Jul 1, 2023 Accepting new patients
Health Care Alliance, Inc. Emergency Medicine CurrentSince Mar 1, 2014 Accepting new patients
Jefferson Memorial Hospital Current Accepting new patients
City Hospital Inc Current Accepting new patients
Mep Health, LLC Emergency Medicine Past Accepting new patients
Baltimore Washington Emergency Physicians, Inc. Emergency Medicine Past Accepting new patients
Bestpractices of West Virginia, Inc. Emergency Medicine Past Accepting new patients
Commonwealth Emergency Physicians PC PastSince Apr 17, 2020 Accepting new patients
Commonwealth Emergency Physicians PC Emergency Medicine Past Accepting new patients
Bestpractices, Inc. Emergency Medicine Past Accepting new patients
Bestpractices, Inc. Emergency Medicine Past Accepting new patients
Marshall West Virginia Ed Associates, LLC Emergency Medicine Past Accepting new patients
Johns Hopkins Emergency Medical Past Accepting new patients

Locations

1710 Harper Rd
Beckley, WV 25801
Phone (304) 252-0641

20 Hospital Dr
Logan, WV 25601
Phone (304) 792-1101

2500 Hospital Dr
Martinsburg, WV 25401
Phone (304) 233-4134

1824 Murdoch Ave
Parkersburg, WV 26101
Phone (304) 424-4057

800 Garfield Ave
Parkersburg, WV 26101
Phone (304) 420-7161

300 S Preston St
Ranson, WV 25438
Phone (304) 728-1600

Interoperability endpoints

  • Direct secure messaging: mlondner20116@direct.wvuhsdirect.com

Ownership & related parties

All facility ownership & control disclosures 2

Facilities whose Medicare enrollment lists this provider’s PECOS associate ID as an owner or managing party.

FacilityTypeRoleSince
Jefferson Medical CenterRanson, WV, CCN 511319 Hospital Corporate Director Jan 1, 2021
Harpers Ferry Family MedicineHarpers Ferry, WV, CCN 513897 Rural health clinic Corporate Director Dec 15, 2025

Owned or controlled facilities with NPI records 5

Facilities whose Medicare enrollment lists this provider as an owner, officer, director or managing party.

Organizations & group practices 15

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

View all 15

NPI Registry JSON

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

{
    "created_epoch": "1146787200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1346298700",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 13700-1369",
            "address_2": "COMMONWEALTH EMERGENCY PHYSICIANS PC",
            "city": "PHILADELPHIA",
            "state": "PA",
            "postal_code": "191911369",
            "telephone_number": "800-666-2455",
            "fax_number": "610-617-6280"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "44045 RIVERSIDE PARKWAY",
            "address_2": "LOUDOUN HOSPITAL CENTER",
            "city": "LEESBURG",
            "state": "VA",
            "postal_code": "20176",
            "telephone_number": "703-858-6040",
            "fax_number": "610-617-6280"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LONDNER",
        "first_name": "MICHAEL",
        "middle_name": "STEPHEN",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-05",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "VA",
            "license": "0101237389",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Leesburg, VA

Sources for this page

Verify at the official NPI Registry.