Convert ICD-10 Code Z51.81 to ICD-9

Source ICD-10 Code Target ICD-9 Code
Z51.81
Encounter for therapeutic drug level monitoring
V58.83
Therapeutic drug monitor

ICD-10 to ICD-9 crosswalk for code Z51.81 - encounter for therapeutic drug level monitoring based on the most recent General Equivalence Mappings (GEMS) information.