Individual Healthcare Provider
Zachary T Hollis, M.D.
Provider's NPPES record last updated: March 4, 2026
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1104142744
- Primary Specialty
- Internal Medicine — Clinical Cardiac Electrophysiology
- Practice Location
- Fairfax, 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 18, 2026, 11:22 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
Internal Medicine
Clinical Cardiac Electrophysiology
Allopathic & Osteopathic Physicians
A field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical procedures to evaluate heart rhythms and determine appropriate treatment for them.
Taxonomy code 207RC0001X Internal Medicine
Allopathic & Osteopathic Physicians
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Taxonomy code 207R00000XInternal Medicine
Cardiovascular Disease
Allopathic & Osteopathic Physicians
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Taxonomy code 207RC0000X
Provider-Reported License Information
- Internal Medicine (Virginia)
- 0101265236
- Internal Medicine (Virginia)
- 0101265236
- Internal Medicine (Virginia)
- 0101265236
Practice Locations
Practice Location
8081 Innovation Park Dr Ste 602
Fairfax, Virginia 22031-4867
Phone: (571) 472-3270
Additional Practice Location
3300 Gallows Rd
Falls Church, Virginia 22042-3307
Phone: (703) 776-4001
Fax: (703) 776-7113
Additional Practice Location
224d Cornwall St Nw Ste 306
Leesburg, Virginia 20176-2704
Phone: (571) 472-3270
Fax: (571) 472-3271
Additional Practice Location
44084 Riverside Pkwy
Leesburg, Virginia 20176-8279
Phone: (571) 472-3270
Fax: (571) 472-3271
Additional Practice Location
3025 Hamaker Ct Ste 101
Fairfax, Virginia 22031-2229
Phone: (571) 472-3270
Fax: (571) 472-3271
Additional Practice Location
21785 Filigree Ct Ste 203
Ashburn, Virginia 20147-6214
Phone: (571) 472-3270
Fax: (571) 472-3271
Additional Practice Location
4320 Seminary Rd
Alexandria, Virginia 22304-1535
Phone: (703) 504-3000
Fax: (703) 504-3388
Additional Practice Location
44045 Riverside Pkwy
Leesburg, Virginia 20176-5101
Phone: (703) 858-6000
Fax: (703) 858-6900
Additional Practice Location
104 Selma Dr
Winchester, Virginia 22601-3834
Phone: (540) 678-2800
Additional Practice Location
351 Valley Health Way # 200
Front Royal, Virginia 22630-6480
Phone: (540) 636-0600
Fax: (540) 636-0629
Additional Practice Location
190 Campus Blvd Ste 201
Winchester, Virginia 22601
Phone: (540) 662-0306
Fax: (855) 264-2066
Additional Practice Location
190 Campus Blvd Ste 201
Winchester, Virginia 22601
Phone: (540) 662-0306
Fax: (855) 264-2066
Record Information
- Enumeration Date
- April 7, 2010
- Provider's NPPES Record Last Updated
- March 4, 2026
- Certification Date
- March 4, 2026
- NPISignal NPPES Dataset
- August 2026
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