Context Group ID 7020 comprises all document names (i.e., terms with Scale "DOC") within the HIPAA Attachments class of the LOINC coding scheme. The Coding Scheme Designator shall be LN.
A subset of this Context Group directly applicable to imaging reports is in CID 7000 “Diagnostic Imaging Report Document Titles”.
The LOINC coding scheme can be found at http://www.regenstrief.org/loinc.