R94Abnormal results of function studies

R94 is the ICD-10-CM diagnosis code for abnormal results of function studies. It belongs to block R90-R94 (abnormal findings on diagnostic imaging and in function studies, without diagnosis) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: R94.0 (of central nervous system), R94.1 (of peripheral nervous system and special senses), R94.2 (studies), R94.3 (studies), R94.4 (studies), R94.5 (studies), R94.6 (studies), R94.7 (studies) and 1 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.