ICD-9-CM diagnosis code (retired)
963.4 — Poisoning by enzymes, not elsewhere classified
About ICD-9-CM 963.4
963.4 is an ICD-9-CM diagnosis code for poisoning by enzymes, not elsewhere classified. 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 T45.3X1A (Poisoning by enzymes, accidental (unintentional), initial encounter), T45.3X2A (Poisoning by enzymes, intentional self-harm, initial encounter) and T45.3X3A (Poisoning by enzymes, assault, initial encounter). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- T45.3X1APoisoning by enzymes, accidental (unintentional), initial encounterapproximate
- T45.3X2APoisoning by enzymes, intentional self-harm, initial encounterapproximate
- T45.3X3APoisoning by enzymes, assault, initial encounterapproximate
- T45.3X4APoisoning by enzymes, undetermined, initial encounterapproximate
Common questions about 963.4
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.