ICD-9-CM diagnosis code (retired)
V58.83 — Encounter for therapeutic drug monitoring
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM V58.83
V58.83 is an ICD-9-CM diagnosis code for encounter for therapeutic drug monitoring. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to one ICD-10-CM code, Z51.81 (Encounter for therapeutic drug level monitoring). The match is exact.
ICD-10-CM equivalents
- Z51.81Encounter for therapeutic drug level monitoringexact match
Common questions about V58.83
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.