Convert to ICD-10-CM: 
989.1 converts approximately to:
- 2015/16 ICD-10-CM T65.1X1A Toxic effect of strychnine and its salts, accidental (unintentional), initial encounterOr: 
- 2015/16 ICD-10-CM T65.1X2A Toxic effect of strychnine and its salts, intentional self-harm, initial encounterOr: 
- 2015/16 ICD-10-CM T65.1X3A Toxic effect of strychnine and its salts, assault, initial encounterOr: 
- 2015/16 ICD-10-CM T65.1X4A Toxic effect of strychnine and its salts, undetermined, initial encounter