Individual Healthcare Provider
Ian Thomas Greenwalt, M.D.
Provider's NPPES record last updated: December 6, 2024
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1720405665
- Primary Specialty
- Surgery
- Practice Location
- Haymarket, Virginia
- 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 20, 2026, 2:34 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
Surgery
Allopathic & Osteopathic Physicians
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Taxonomy code 208600000X Surgery
Surgical Oncology
Allopathic & Osteopathic Physicians
A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research.
Taxonomy code 2086X0206X
Provider-Reported License Information
- Surgery (Virginia)
- 0101283801
- Surgery (District of Columbia)
- MD047318
Practice Locations
Practice Location
15195 Heathcote Blvd Ste 240
Haymarket, Virginia 20169-6245
Phone: (571) 284-3460
Additional Practice Location
3800 Reservoir Rd Nw
Washington, District of Columbia 20007-2113
Phone: (202) 295-0560
Additional Practice Location
15225 Heathcote Blvd
Haymarket, Virginia 20169-6264
Phone: (571) 284-1000
Additional Practice Location
8700 Sudley Rd
Manassas, Virginia 20110-4418
Phone: (703) 369-8000
Record Information
- Enumeration Date
- March 27, 2014
- Provider's NPPES Record Last Updated
- December 6, 2024
- Certification Date
- December 6, 2024
- NPISignal NPPES Dataset
- August 2026
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