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NPISignal

Individual Healthcare Provider

Zachary T Hollis, M.D.

NPI Record: ActiveInternal Medicine — Clinical Cardiac Electrophysiology
NPI1104142744
Fairfax, Virginia

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 identified

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

Not checked

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.

Run a name-based screening

Searches OIG LEIE and SAM.gov by name and reviews every potential match.

Specialties & Taxonomies

  • Internal Medicine

    Clinical Cardiac Electrophysiology

    Allopathic & Osteopathic Physicians

    Primary

    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 207R00000X
  • Internal 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
License numbers are reported by the provider to NPPES and are not independently verified by NPISignal against any state licensing board. Confirm current license status directly with the issuing state board.

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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