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

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

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

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

• Inova Health Care Services

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

  DC, Internal Medicine, VA

  Medicare reassignment Care Compare group NPD
• Selma Medical Assoc Inc

  • Internal Medicine Physician
  • Winchester, VA
  • NPI 1144325721

  VA

  Medicare reassignment Care Compare group
• Page Memorial Hospital, Inc.

  • Critical Access Hospital
  • Luray, VA
  • NPI 1326040684

  VA

  Medicare reassignment NPD
• Shenandoah Memorial Hospital, Inc.

  • Rural Health Clinic/Center
  • Woodstock, VA
  • NPI 1952417735

  VA

  Medicare reassignment NPD
• Valley Physician Enterprise, Inc

  • Surgery Physician
  • Winchester, VA
  • NPI 1538316203

  Internal Medicine, VA

  Medicare reassignment NPD
• Warren Memorial Hospital, Inc.

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

  Cardiovascular Disease, VA

  Medicare reassignment NPD
• Winchester Medical Center

  • Critical Care Medicine (Internal Medicine) Physician
  • Winchester, VA
  • NPI 1679711261

  VA

  Medicare reassignment NPD
• Inova Health Care Services

  • Medical Technologist
  • Sterling, VA
  • NPI 1699655589
  Care Compare group NPD
• Inova Health Care Services

  • Rehabilitation Hospital Unit
  • Alexandria, VA
  • NPI 1013048990
  Care Compare group
• Inova Health Care Services

  • Physical Therapist
  • Springfield, VA
  • NPI 1043563257
  Care Compare group
• Inova Health Care Services

  • Community/Retail Pharmacy
  • Fairfax, VA
  • NPI 1093526295
  Care Compare group
• Inova Health Care Services

  • Psychiatric Hospital Unit
  • Alexandria, VA
  • NPI 1104957083
  Care Compare group

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

• Inova Health Care Services

  • General Acute Care Hospital
  • Alexandria, VA
  • NPI 1255684460

  Hospital

  Care Compare affiliation
• Inova Health Care Services

  • Psychiatric Hospital Unit
  • Leesburg, VA
  • NPI 1285786228

  Hospital

  Care Compare affiliation
• Inova Health Care Services

  • General Acute Care Hospital
  • Leesburg, VA
  • NPI 1376564302

  Hospital

  Care Compare affiliation
• Inova Health Care Services

  • Rehabilitation Hospital Unit
  • Falls Church, VA
  • NPI 1588795462

  Hospital

  Care Compare affiliation
• Inova Health Care Services

  • General Acute Care Hospital
  • Fairfax, VA
  • NPI 1760513980

  Hospital

  Care Compare affiliation
• Inova Health Care Services

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

  Hospital

  Care Compare affiliation

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 Inc 30 clinicians

Inova Health Care Services 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

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

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    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772582400000",
    "number": "1104142744",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 3250",
            "city": "WINCHESTER",
            "state": "VA",
            "postal_code": "226042450",
            "telephone_number": "703-776-4001",
            "fax_number": "703-776-2338"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8081 INNOVATION PARK DR STE 602",
            "city": "FAIRFAX",
            "state": "VA",
            "postal_code": "220314867",
            "telephone_number": "571-472-3270",
            "fax_number": "571-472-3271"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3300 Gallows Rd",
            "address_purpose": "LOCATION",
            "city": "Falls Church",
            "state": "VA",
            "postal_code": "220423307",
            "country_code": "US",
            "telephone_number": "703-776-4001",
            "fax_number": "703-776-7113",
            "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": "44084 Riverside Pkwy",
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            "country_code": "US",
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            "fax_number": "571-472-3271",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3025 Hamaker Ct Ste 101",
            "address_purpose": "LOCATION",
            "city": "Fairfax",
            "state": "VA",
            "postal_code": "220312229",
            "country_code": "US",
            "telephone_number": "571-472-3270",
            "fax_number": "571-472-3271",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "21785 Filigree Ct Ste 203",
            "address_purpose": "LOCATION",
            "city": "Ashburn",
            "state": "VA",
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            "country_code": "US",
            "telephone_number": "571-472-3270",
            "fax_number": "571-472-3271",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4320 Seminary Rd",
            "address_purpose": "LOCATION",
            "city": "Alexandria",
            "state": "VA",
            "postal_code": "223041535",
            "country_code": "US",
            "telephone_number": "703-504-3000",
            "fax_number": "703-504-3388",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "44045 Riverside Pkwy",
            "address_purpose": "LOCATION",
            "city": "Leesburg",
            "state": "VA",
            "postal_code": "201765101",
            "country_code": "US",
            "telephone_number": "703-858-6000",
            "fax_number": "703-858-6900",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "104 Selma Dr",
            "address_purpose": "LOCATION",
            "city": "Winchester",
            "state": "VA",
            "postal_code": "226013834",
            "country_code": "US",
            "telephone_number": "540-678-2800",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "351 Valley Health Way # 200",
            "address_purpose": "LOCATION",
            "city": "Front Royal",
            "state": "VA",
            "postal_code": "226306480",
            "country_code": "US",
            "telephone_number": "540-636-0600",
            "fax_number": "540-636-0629",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "190 Campus Blvd Ste 201",
            "address_purpose": "LOCATION",
            "city": "Winchester",
            "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"
        },
        {
            "address_1": "190 Campus Blvd Ste 201",
            "address_purpose": "LOCATION",
            "city": "Winchester",
            "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"
        }
    ],
    "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": "2026-03-04",
        "certification_date": "2026-03-04",
        "status": "A"
    },
    "taxonomies": [
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            "code": "207R00000X",
            "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
        },
        {
            "code": "207RC0001X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Clinical Cardiac Electrophysiology",
            "state": "VA",
            "license": "0101265236",
            "primary": true
        }
    ],
    "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"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "zhollis581614@soc.inova.org",
            "affiliation": "N",
            "address_1": "1870 Amherst St Ste 200",
            "city": "Winchester",
            "state": "VA",
            "country_code": "US",
            "postal_code": "226016254",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "zhollis581614@soc.inova.org",
            "affiliation": "N",
            "address_1": "1870 Amherst St Ste 100",
            "city": "Winchester",
            "state": "VA",
            "country_code": "US",
            "postal_code": "226016254",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "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",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "zhollis581614@soc.inova.org",
            "affiliation": "N",
            "address_1": "351 Valley Health Way # 200",
            "city": "Front Royal",
            "state": "VA",
            "country_code": "US",
            "postal_code": "226306480",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "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

• All providers in Fairfax, VA
• Clinical Cardiac Electrophysiology Physician in Virginia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 4, 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.