The name for a group of subfields that describe the fourth course or set of subsequent therapy. As of January 1, 2003, CoC no longer support Subsequent Therapy data items.

Group names appear only in the data dictionary and Appendix E.

Subfields
         Subsq RX 4th Course Surg [1711]
         Subsq RX 4th Course Rad [1712]
         Subsq RX 4th Course Chemo [1713]
         Subsq RX 4th Course Horm [1714]
         Subsq RX 4th Course BRM [1715]
         Subsq RX 4th Course Oth [1716]