Active NPI
James Arthur Knight II, MD
- Radiation Oncology Physician
- Lexington, KY
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Radiation Oncology Physician
- License
- D0103630
- 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, 2025
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 3
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| 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, DC
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 2
Care Compare profile
Medicare Care Compare- Specialty
- Radiation Oncology
- Education
- Indiana University School of Medicine, 2020
- Medicare assignment
- May accept Medicare assignment
- Group practices
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
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Johns Hopkins University | Current | Accepting new patients | |
| Johns Hopkins University | Current | Accepting new patients | |
| Johns Hopkins University | Radiation Oncology | Current | Accepting new patients |
| Johns Hopkins University | Current | 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
- 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.
-
dba Jhu - Radiation Oncology
- Radiation Oncology Physician
- Baltimore, MD
- NPI 1710106414
DC
-
dba Jhu - Anesthesia Pain MGMT
- Pain Medicine (Anesthesiology) Physician
- Baltimore, MD
- NPI 1922008549
-
dba JHU - 4692 Millennium Drive - Physician
- Ophthalmology Physician
- Belcamp, MD
- NPI 1376342774
-
dba JHU - 6849 Old Dominion Drive - Physician
- Neurology Physician
- McLean, VA
- NPI 1598552226
-
dba Jhu - Cardiology
- Cardiovascular Disease Physician
- Baltimore, MD
- NPI 1801891080
Hospital & facility affiliations 1
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
dba Sibley Memorial Hospital
- General Acute Care Hospital
- Washington, DC
- NPI 1366492977
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
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 1, 2025; 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.