2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Supplementary Classification Of Factors Influencing Health Status And Contact With Health Services V01-V85 > Persons Encountering Health Services For Specific Procedures And Aftercare V50-V59 > Encounter For Other And Unspecified Procedures And Aftercare V58.* > 2006 ICD-9-CM Diagnosis V58.83 Encounter for therapeutic drug monitoring View the most recent version of ICD-9-CM V58.83 V58.83 is a specific code that can be used to specify a diagnosis V58.83 contains 3 index entries View the ICD-9-CM Volume 1 V58.* hierarchy V58.83 Excludes blood-drug testing for medicolegal reasons (V70.4)  Index entries containing V58.83: Admission (encounter) for drug monitoring, therapeutic V58.83 therapeutic drug monitoring V58.83 Test(s) blood-drug V70.4 for therapeutic drug monitoring V58.83