ICD-10-CM>R00-R99>R70-R79>R74R74Abnormal serum enzyme levelsNon-Billable/Non-SpecificCodesR74.0Nonspecific elevation of levels of transaminase and lactic acid dehydrogenase [LDH]R74.01Elevation of levels of liver transaminase levelsR74.02Elevation of levels of lactic acid dehydrogenase [LDH]R74.8Abnormal levels of other serum enzymesR74.9Abnormal serum enzyme level, unspecified