R74.0Nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH]

R74.0 is the ICD-10-CM diagnosis code for nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH]. It belongs to category R74 (abnormal serum enzyme levels), block R70-R79 (abnormal findings on examination of blood, 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 2 subcodes must be used instead.

Within R74 (abnormal serum enzyme levels), R74.0 is specifically for nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH]. Related codes cover abnormal levels of other serum enzymes (R74.8) and abnormal serum enzyme level, unspecified (R74.9).

To report this condition, pick the subcode that matches the documentation: R74.01 (levels) and R74.02 ([LDH]).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2021 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 790.4 (nonspecific elevation of levels of transaminase or lactic acid dehydrogenase [LDH]).