ICD-9-CM diagnosis code (retired)
966.3 — Poisoning by other and unspecified anticonvulsants
About ICD-9-CM 966.3
966.3 is an ICD-9-CM diagnosis code for poisoning by other and unspecified anticonvulsants. 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 16 ICD-10-CM codes, such as T42.1X1A (Poisoning by iminostilbenes, accidental (unintentional), initial encounter), T42.1X2A (Poisoning by iminostilbenes, intentional self-harm, initial encounter) and T42.1X3A (Poisoning by iminostilbenes, assault, initial encounter). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
- T42.1X1APoisoning by iminostilbenes, accidental (unintentional), initial encounterapproximate
- T42.1X2APoisoning by iminostilbenes, intentional self-harm, initial encounterapproximate
- T42.1X3APoisoning by iminostilbenes, assault, initial encounterapproximate
- T42.1X4APoisoning by iminostilbenes, undetermined, initial encounterapproximate
- T42.5X1APoisoning by mixed antiepileptics, accidental (unintentional), initial encounterapproximate
- T42.5X2APoisoning by mixed antiepileptics, intentional self-harm, initial encounterapproximate
- T42.5X3APoisoning by mixed antiepileptics, assault, initial encounterapproximate
- T42.5X4APoisoning by mixed antiepileptics, undetermined, initial encounterapproximate
- T42.6X1APoisoning by other antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounterapproximate
- T42.6X2APoisoning by other antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounterapproximate
- T42.6X3APoisoning by other antiepileptic and sedative-hypnotic drugs, assault, initial encounterapproximate
- T42.6X4APoisoning by other antiepileptic and sedative-hypnotic drugs, undetermined, initial encounterapproximate
- T42.71XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, accidental (unintentional), initial encounterapproximate
- T42.72XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, intentional self-harm, initial encounterapproximate
- T42.73XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, assault, initial encounterapproximate
- T42.74XAPoisoning by unspecified antiepileptic and sedative-hypnotic drugs, undetermined, initial encounterapproximate
Common questions about 966.3
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.