ICD-9-CM diagnosis code (retired)
985.0 — Toxic effect of mercury and its compounds
About ICD-9-CM 985.0
985.0 is an ICD-9-CM diagnosis code for toxic effect of mercury and its compounds. 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 T56.1X1A (Toxic effect of mercury and its compounds, accidental (unintentional), initial encounter), T56.1X2A (Toxic effect of mercury and its compounds, intentional self-harm, initial encounter) and T56.1X3A (Toxic effect of mercury and its compounds, assault, initial encounter). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- T56.1X1AToxic effect of mercury and its compounds, accidental (unintentional), initial encounterapproximate
- T56.1X2AToxic effect of mercury and its compounds, intentional self-harm, initial encounterapproximate
- T56.1X3AToxic effect of mercury and its compounds, assault, initial encounterapproximate
- T56.1X4AToxic effect of mercury and its compounds, undetermined, initial encounterapproximate
Common questions about 985.0
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.