ICD-10-CM > S00-T88 > T36-T50 > T44 > T44.9 > T44.99 T44.99 Poisoning by, adverse effect of and underdosing of other drugs primarily affecting the autonomic nervous system Non-Billable/Non-Specific Codes T44.991Poisoning by other drug primarily affecting the autonomic nervous system, accidental (unintentional)T44.991A..., initial encounterT44.991D..., subsequent encounterT44.991S..., sequelaT44.992Poisoning by other drug primarily affecting the autonomic nervous system, intentional self-harmT44.992A..., initial encounterT44.992D..., subsequent encounterT44.992S..., sequelaT44.993Poisoning by other drug primarily affecting the autonomic nervous system, assaultT44.993A..., initial encounterT44.993D..., subsequent encounterT44.993S..., sequelaT44.994Poisoning by other drug primarily affecting the autonomic nervous system, undeterminedT44.994A..., initial encounterT44.994D..., subsequent encounterT44.994S..., sequelaT44.995Adverse effect of other drug primarily affecting the autonomic nervous systemT44.995A..., initial encounterT44.995D..., subsequent encounterT44.995S..., sequelaT44.996Underdosing of other drug primarily affecting the autonomic nervous systemT44.996A..., initial encounterT44.996D..., subsequent encounterT44.996S..., sequela