Zachary T Hollis, M.D.

Primary specialty

Clinical Cardiac Electrophysiology PhysicianTaxonomy code 207RC0001X

License

0101265236 Issued in VA

Practice address

8081 Innovation Park Dr Ste 602
Fairfax, VA 22031-4867

Phone

(571) 472-3270

Fax

(571) 472-3271

NPI assigned

Apr 7, 2010

Last updated

Sep 29, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 3

Addresses

Electronic endpoints 7

Medicare fee-for-service enrollment

Enrolled in VA, DC2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Cardiac ElectrophysiologyAlso: Cardiovascular Disease (Cardiology), Internal Medicine

Education

University of Illinois College of Med (CHI/Peor/Rock/CHM-Urb), 2010

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Selma Medical Assoc IncGroup PAC ID 5092618611, 30 clinicians

Inova Health Care ServicesGroup PAC ID 2466351093, 1,821 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Inova Fairfax Hospital Hospital, Falls Church, VA, CCN 490063
• Inova Loudoun Hospital Hospital, Leesburg, VA, CCN 490043
• Inova Alexandria Hospital Hospital, Alexandria, VA, CCN 490040
• Inova Fair Oaks Hospital Hospital, Fairfax, VA, CCN 490101

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: zhollis581614@soc.inova.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Inova Health Care Services

  • Internal Medicine Physician
  • Falls Church, VA
  • NPI 1952320061

  DC

  Medicare reassignment Care Compare group NPD
• Selma Medical Assoc Inc

  • Internal Medicine Physician
  • Winchester, VA
  • NPI 1144325721
  Medicare reassignment Care Compare group
• Page Memorial Hospital, Inc.

  • Critical Access Hospital
  • Luray, VA
  • NPI 1326040684
  Medicare reassignment NPD
• Shenandoah Memorial Hospital, Inc.

  dba Valley Health Shenandoah Memorial Hospital Multispecialty Clinic

  • Rural Health Clinic/Center
  • Woodstock, VA
  • NPI 1952417735
  Medicare reassignment NPD
• Valley Physician Enterprise, Inc

  • Surgery Physician
  • Winchester, VA
  • NPI 1538316203

  Internal Medicine

  Medicare reassignment NPD
• Warren Memorial Hospital, Inc.

  dba Warren Memorial Hospital

  • Emergency Medicine Physician
  • Front Royal, VA
  • NPI 1164442281

  Cardiovascular Disease

  Medicare reassignment NPD
• Winchester Medical Center

  dba Valley Intensivists

  • Critical Care Medicine (Internal Medicine) Physician
  • Winchester, VA
  • NPI 1679711261
  Medicare reassignment NPD
• Inova Health Care Services

  dba Inova Blood Donor Services

  • Medical Technologist
  • Sterling, VA
  • NPI 1699655589
  NPD
• Page Memorial Hospital Inc.

  dba Valley Health/Page Memorial Hospital/ Family Medicine/Washington

  • Rural Health Clinic/Center
  • Washington, VA
  • NPI 1639552995
  NPD
• Page Memorial Hospital, Inc.

  dba Valley Health Shenandoah Medical Associates

  • Rural Health Clinic/Center
  • Front Royal, VA
  • NPI 1083236970

  Internal Medicine

  NPD
• Shenandoah Memorial Hospital, Inc.

  • Critical Access Hospital
  • Woodstock, VA
  • NPI 1033166442
  NPD
• Shenandoah Memorial Hospital, Inc.

  dba VH SMH Shenandoah Valley Family Medicine

  • Family Medicine Physician
  • Strasburg, VA
  • NPI 1598263584
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Inova Health Care Services

  dba Inova Alexandria Hospital

  • General Acute Care Hospital
  • Alexandria, VA
  • NPI 1255684460
  Care Compare affiliation
• Inova Health Care Services

  dba Inova Loudoun Hospital

  • Psychiatric Hospital Unit
  • Leesburg, VA
  • NPI 1285786228
  Care Compare affiliation
• Inova Health Care Services

  dba Inova Loudoun Hospital

  • General Acute Care Hospital
  • Leesburg, VA
  • NPI 1376564302
  Care Compare affiliation
• Inova Health Care Services

  dba Inova Fairfax Hospital

  • Rehabilitation Hospital Unit
  • Falls Church, VA
  • NPI 1588795462
  Care Compare affiliation
• Inova Health Care Services

  dba Inova Fair Oaks Hospital

  • General Acute Care Hospital
  • Fairfax, VA
  • NPI 1760513980
  Care Compare affiliation
• Inova Health Care Services

  dba Inova Fairfax Hospital

  • General Acute Care Hospital
  • Falls Church, VA
  • NPI 1831220714
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

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    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790640000000",
    "number": "1104142744",
    "addresses": [
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            "country_code": "US",
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            "address_1": "104 SELMA DR",
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    "practiceLocations": [
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            "address_1": "4320 Seminary Rd",
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            "address_1": "3300 Gallows Rd",
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            "telephone_number": "540-636-0600",
            "fax_number": "540-636-0629",
            "country_name": "United States",
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        },
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            "address_1": "21785 Filigree Ct Ste 203",
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            "city": "Ashburn",
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        {
            "address_1": "3025 Hamaker Ct Ste 101",
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            "postal_code": "220312229",
            "country_code": "US",
            "telephone_number": "571-472-3270",
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            "address_1": "44084 Riverside Pkwy",
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            "state": "VA",
            "postal_code": "201768279",
            "country_code": "US",
            "telephone_number": "571-472-3270",
            "fax_number": "571-472-3271",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "224D Cornwall St NW Ste 306",
            "address_purpose": "LOCATION",
            "city": "Leesburg",
            "state": "VA",
            "postal_code": "201762704",
            "country_code": "US",
            "telephone_number": "571-472-3270",
            "fax_number": "571-472-3271",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "104 Selma Dr",
            "address_purpose": "LOCATION",
            "city": "Winchester",
            "state": "VA",
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            "country_code": "US",
            "telephone_number": "540-678-2800",
            "country_name": "United States",
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        {
            "address_1": "190 Campus Blvd Ste 201",
            "address_purpose": "LOCATION",
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            "state": "VA",
            "postal_code": "22601",
            "country_code": "US",
            "telephone_number": "540-662-0306",
            "fax_number": "855-264-2066",
            "country_name": "United States",
            "address_type": "DOM"
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    ],
    "basic": {
        "last_name": "HOLLIS",
        "first_name": "ZACHARY",
        "middle_name": "T",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2010-04-07",
        "last_updated": "2026-09-29",
        "certification_date": "2026-09-29",
        "status": "A"
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            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "VA",
            "license": "0101265236",
            "primary": false
        },
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "VA",
            "license": "0101265236",
            "primary": false
        },
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            "desc": "Internal Medicine, Clinical Cardiac Electrophysiology",
            "state": "VA",
            "license": "0101265236",
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        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "zhollis581614@soc.inova.org",
            "affiliation": "N",
            "address_1": "1840 Amherst St",
            "city": "Winchester",
            "state": "VA",
            "country_code": "US",
            "postal_code": "226012808",
            "country_name": "United States",
            "address_type": "DOM"
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        {
            "endpointType": "DIRECT",
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            "affiliation": "N",
            "address_1": "1870 Amherst St Ste 200",
            "city": "Winchester",
            "state": "VA",
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            "postal_code": "226016254",
            "country_name": "United States",
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            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
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            "city": "Winchester",
            "state": "VA",
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            "country_name": "United States",
            "address_type": "DOM"
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            "endpointType": "DIRECT",
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            "endpoint": "zhollis581614@soc.inova.org",
            "affiliation": "N",
            "address_1": "1000 N Shenandoah Ave",
            "city": "Front Royal",
            "state": "VA",
            "country_code": "US",
            "postal_code": "226303547",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "zhollis581614@soc.inova.org",
            "affiliation": "N",
            "address_1": "759 S Main St",
            "city": "Woodstock",
            "state": "VA",
            "country_code": "US",
            "postal_code": "226641154",
            "country_name": "United States",
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            "endpoint": "zhollis581614@soc.inova.org",
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            "city": "Front Royal",
            "state": "VA",
            "country_code": "US",
            "postal_code": "226306480",
            "country_name": "United States",
            "address_type": "DOM"
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        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "zhollis581614@soc.inova.org",
            "affiliation": "N",
            "address_1": "200 Memorial Dr",
            "city": "Luray",
            "state": "VA",
            "country_code": "US",
            "postal_code": "228351000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Catherine Grace Engibous Holder, PA-C
• Donald Gene Hollenbeck Jr.
• Christina Friedl Holley
• Donisha Shawnetta Holley, MSW, LCSW
• Susan Sundstrom Hollingsworth, CCC-SLP
• Rebecca Anne Hollow
• Holly Integrated Medicine,LLC
• Courtney Ann Holmberg
• Chelsea Nicole Holmes, LPC
• Lauren Mary Holmes

• Clinical Cardiac Electrophysiology Physician in Fairfax, VA
• Providers in Fairfax, VA by specialty
• Clinical Cardiac Electrophysiology Physician in Virginia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 29, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.