Individual Healthcare Provider
Alexander Nissen
Provider's NPPES record last updated: August 20, 2025
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1730540386
- Primary Specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery)
- Practice Location
- Bethesda, Maryland
- Sole Proprietor
- No
Federal Screening
NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.
List of Excluded Individuals/Entities (LEIE)
HHS Office of Inspector General
No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.
- Source data
- September 10, 2026
- Records indexed
- 84,001
- Screened
- Sep 18, 2026, 2:38 PM UTC
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
SAM.gov Exclusions
U.S. General Services Administration
SAM.gov Exclusions was not checked.
SAM.gov screening is not configured on this deployment. No SAM check has been performed.
- Screened
- Not checked
This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
Searches OIG LEIE and SAM.gov by name and reviews every potential match.
Specialties & Taxonomies
- Primary
Thoracic Surgery (Cardiothoracic Vascular Surgery)
Allopathic & Osteopathic Physicians
A thoracic surgeon provides the operative, perioperative and critical care of patients with pathologic conditions within the chest. Included is the surgical care of coronary artery disease, cancers of the lung, esophagus and chest wall, abnormalities of the trachea, abnormalities of the great vessels and heart valves, congenital anomalies, tumors of the mediastinum and diseases of the diaphragm. The management of the airway and injuries of the chest is within the scope of the specialty.
Taxonomy code 208G00000X General Practice
Allopathic & Osteopathic Physicians
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
Taxonomy code 208D00000X
Provider-Reported License Information
- Thoracic Surgery (Cardiothoracic Vascular Surgery) (Virginia)
- 0101263081
- General Practice (Virginia)
- 0101263081
Practice Locations
Practice Location
Walter Reed National Military Medical Center
8901 Wisconsin Ave
Bethesda, Maryland 20889-0004
Phone: (703) 401-2509
Record Information
- Enumeration Date
- March 10, 2016
- Provider's NPPES Record Last Updated
- August 20, 2025
- Certification Date
- August 20, 2025
- NPISignal NPPES Dataset
- August 2026
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