Individual provider Active NPI

James Arthur Knight II, MD

  • Radiation Oncology Physician
  • Lexington, KY
National Provider Identifier
1871121095
Registry record updated Jul 1, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Radiation Oncology PhysicianTaxonomy code 2085R0001X
License
D0103630 Issued in MD
Practice address
University of Kentucky
800 Rose Street
Lexington, KY 40536-0293
Phone
(859) 323-2636
NPI assigned
Apr 1, 2020
Last updated
Jul 1, 2025By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 1, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Radiation Oncology Physician 2085R0001X R5549 KY
Radiation Oncology Physician 2085R0001X MD600004447 DC
Radiation Oncology Physician 2085R0001X D0103630 MD Primary

Addresses

Primary practice location

University of Kentucky
800 Rose Street
Lexington, KY 40536-0293

Mailing address

6201 Greenleigh Ave
Middle River, MD 21220-2004
Phone (410) 933-2704

Other practice location 1

1800 Orleans St
Baltimore, MD 21287-0010
Phone (410) 502-2037

Other practice location 2

5255 Loughboro Rd NW
Washington, DC 20016-2633
Phone (202) 537-4686

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MD, 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

Enrollment IDStateProvider typePAC IDDetails
I20250609001238 MD Practitioner - Radiation Oncology 3971908468 Reassigns benefits to 1 organization
I20250613003489 DC Practitioner - Radiation Oncology 3971908468 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Radiation Oncology
Education
Indiana University School of Medicine, 2020
Medicare assignment
May accept Medicare assignment
Group practices
Johns Hopkins UniversityGroup PAC ID 4981745098, 711 clinicians
Johns Hopkins UniversityGroup PAC ID 8921903147, 2,886 clinicians

Practice addresses (Care Compare)

5215 Loughboro Rd NW
Sibley Memorial Hospital
Washington, DC 20016-2618
Phone (202) 537-4000

5255 Loughboro Rd NW
Sibley Memorial Hospital
Washington, DC 20016-2633
Phone (202) 537-4000

Hospital & facility affiliations

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
Johns Hopkins University CurrentSince Jun 1, 2025 Accepting new patients
Johns Hopkins University CurrentSince Jun 1, 2025 Accepting new patients
Johns Hopkins University Radiation Oncology CurrentSince Jun 1, 2025 Accepting new patients
Johns Hopkins University CurrentSince Jun 1, 2025 Accepting new patients
Johns Hopkins University Current Accepting new patients

Locations

5215 Loughboro Rd NW
Washington, DC 20016
Phone (202) 537-4400

5255 Loughboro Rd NW
Washington, DC 20016
Phone (202) 243-2280

1800 Orleans St
Baltimore, MD 21287
Phone (410) 502-2037

600 N Wolfe St
Baltimore, MD 21287

6201 Greenleigh Ave
Middle River, MD 21220
Phone (410) 933-2704

Interoperability endpoints

  • Direct secure messaging: jknight1365383@direct.hopkinsmedicine.org

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 1

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": "1585699200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1751328000000",
    "number": "1871121095",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6201 GREENLEIGH AVE",
            "city": "MIDDLE RIVER",
            "state": "MD",
            "postal_code": "212202004",
            "telephone_number": "410-933-2704",
            "fax_number": "410-500-4266"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "UNIVERSITY OF KENTUCKY",
            "address_2": "800 ROSE STREET",
            "city": "LEXINGTON",
            "state": "KY",
            "postal_code": "405360293",
            "telephone_number": "859-323-2636"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1800 Orleans St",
            "address_purpose": "LOCATION",
            "city": "Baltimore",
            "state": "MD",
            "postal_code": "212870010",
            "country_code": "US",
            "telephone_number": "410-502-2037",
            "fax_number": "410-955-0737",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "5255 Loughboro Rd NW",
            "address_purpose": "LOCATION",
            "city": "Washington",
            "state": "DC",
            "postal_code": "200162633",
            "country_code": "US",
            "telephone_number": "202-537-4686",
            "fax_number": "202-537-4965",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "KNIGHT",
        "first_name": "JAMES",
        "middle_name": "ARTHUR",
        "name_prefix": "Dr.",
        "name_suffix": "II",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-04-01",
        "last_updated": "2025-07-01",
        "certification_date": "2025-06-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "KY",
            "license": "R5549",
            "primary": false
        },
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "DC",
            "license": "MD600004447",
            "primary": false
        },
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "MD",
            "license": "D0103630",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Lexington, KY

Sources for this page

Verify at the official NPI Registry.