Quick answers
- Which hospitals does James A. Lesniewski work at?
- Medicare's official clinician data lists James A. Lesniewski at 2 hospitals: Inova Loudoun Hospital and Stonesprings Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does James A. Lesniewski see patients?
- Medicare's clinician data lists 2 practice locations, including Ashburn, VA and Dulles, VA. Call before your visit to confirm the address.
- What is James A. Lesniewski's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does James A. Lesniewski accept Medicare assignment?
- Yes. Medicare's clinician data says James A. Lesniewski accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for James A. Lesniewski?
- (703) 729-7652, as listed in official Medicare / NPI Registry data.
- What is James A. Lesniewski's NPI number?
- 1336133941. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James A. Lesniewski works
Medicare's Facility Affiliation Data lists James A. Lesniewski at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Inova Loudoun HospitalLeesburg, VA · Acute Care Hospital · CCN 490043
- Stonesprings Hospital CenterDulles, VA · Acute Care Hospital · CCN 490145
Practice locations
Addresses where James A. Lesniewski is enrolled with Medicare (CMS data updated 2026-10-02).
- 20955 Professional Plz, Suite 200Ashburn, VA 20147 (703) 729‑7652
- 24430 Stone Springs BlvdDulles, VA 20166
Group practices
Medicare enrollment lists James A. Lesniewski as a member of this group (CMS data updated 2026-10-02).
- Loudoun Medical Group, PC271 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Virginia
Clinicians with the same Medicare primary specialty in Virginia — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Perelman School Of Med At The University Of Pennsylvania |
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336133941 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians