NPIMap

Individual provider Active NPI

David Jaihun Byun, MD

  • Radiation Oncology Physician
  • Hartford, CT
National Provider Identifier
1619409802
Registry record updated Feb 25, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Radiation Oncology PhysicianTaxonomy code 2085R0001X
License
80229 Issued in CT
Practice address
80 Seymour St
Hartford, CT 06106-3315
Phone
(860) 545-2803
NPI assigned
Mar 28, 2017
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 25, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Radiation Oncology Physician 2085R0001X 314461 NY
Radiation Oncology Physician 2085R0001X 80229 CT Primary

Addresses

Primary practice location

80 Seymour St
Hartford, CT 06106-3315

Mailing address

80 Seymour St
Hartford, CT 06106-3315
Phone (860) 545-2803

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CT
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20250317003620 CT Practitioner - Radiation Oncology 0244566453 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Radiation Oncology
Education
Other, 2017
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Hartford Radiation Oncology Associates PCGroup PAC ID 8921057654, 11 clinicians

Practice addresses (Care Compare)

80 Seymour St
Hartford, CT 06102-8000
Phone (860) 972-2803

Hospital & facility affiliations

  • Hartford Hospital Hospital, Hartford, CT, CCN 070025
  • Manchester Memorial Hospital Hospital, Manchester, CT, CCN 070027
  • NYU Langone Hospitals Hospital, New York, NY, CCN 330214

Merit-based Incentive Payment System (MIPS)

Final score
90.8 of 100Reported as group
Quality
91.79
Promoting interoperability
100
Improvement activities
40
Cost
75.18

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
80229CTMDRadiation Oncology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
The Charlotte Hungerford Hospital CurrentSince May 1, 2025 Accepting new patients
Hartford Radiation Oncology Associates PC Radiation Oncology CurrentSince Jun 1, 2025 Accepting new patients
Radiation Oncology Physicians of Connecticut, LLC Radiation Oncology CurrentSince Jun 1, 2025 Accepting new patients
The Charlotte Hungerford Hospital CurrentSince May 1, 2025 Accepting new patients
New York City Health and Hospitals Corporation Past Accepting new patients

Locations

80 Fisher Dr
Avon, CT 06001
Phone (855) 255-6181

263 Farmington Ave
Farmington, CT 06030
Phone (860) 679-4477

85 Retreat Ave
Hartford, CT 06106
Phone (860) 249-6291

80 Seymour St
Hartford, CT 06106
Phone (860) 545-2249

100 Haynes St
Manchester, CT 06040
Phone (860) 533-2929

326 Washington St
Norwich, CT 06360
Phone (860) 701-0140

200 Kennedy Dr
Torrington, CT 06790
Phone (860) 482-5384

540 Litchfield St
Torrington, CT 06790
Phone (860) 496-6361

Interoperability endpoints

  • Direct secure messaging: dbyun673392@nychhc.direct-ci.com
  • Direct secure messaging: dbyun107494@connecticutchildrens.direct-ci.com

Organizations & group practices 5

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.

Hospital & facility affiliations 10

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

NPI Registry JSON

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

{
    "created_epoch": "1490659200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1740441600000",
    "number": "1619409802",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "80 SEYMOUR ST",
            "city": "HARTFORD",
            "state": "CT",
            "postal_code": "061063315",
            "telephone_number": "860-545-2803"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "80 SEYMOUR ST",
            "city": "HARTFORD",
            "state": "CT",
            "postal_code": "061063315",
            "telephone_number": "860-545-2803"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BYUN",
        "first_name": "DAVID",
        "middle_name": "JAIHUN",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2017-03-28",
        "last_updated": "2025-02-25",
        "certification_date": "2025-02-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "NY",
            "license": "314461",
            "primary": false
        },
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "CT",
            "license": "80229",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Hartford, CT

Sources for this page

Verify at the official NPI Registry.