ICD-10-CM > S00-T88 > T36-T50 > T50 > T50.9 > T50.99 > T50.994 T50.994 Poisoning by other drugs, medicaments and biological substances, undetermined Non-Billable/Non-Specific Codes T50.994A..., initial encounterT50.994D..., subsequent encounterT50.994S..., sequela