ICD-9-CM diagnosis code (retired)
987.6 — Toxic effect of chlorine gas
About ICD-9-CM 987.6
987.6 is an ICD-9-CM diagnosis code for toxic effect of chlorine gas. 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 4 ICD-10-CM codes, such as T59.4X1A (Toxic effect of chlorine gas, accidental (unintentional), initial encounter), T59.4X2A (Toxic effect of chlorine gas, intentional self-harm, initial encounter) and T59.4X3A (Toxic effect of chlorine gas, assault, initial encounter). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- T59.4X1AToxic effect of chlorine gas, accidental (unintentional), initial encounterapproximate
- T59.4X2AToxic effect of chlorine gas, intentional self-harm, initial encounterapproximate
- T59.4X3AToxic effect of chlorine gas, assault, initial encounterapproximate
- T59.4X4AToxic effect of chlorine gas, undetermined, initial encounterapproximate
Common questions about 987.6
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.