ICD-10-CM > S00-T88 > T36-T50 > T48 > T48.1 > T48.1X > T48.1X1 T48.1X1 Poisoning by skeletal muscle relaxants [neuromuscular blocking agents], accidental (unintentional) Non-Billable/Non-Specific Applicable To Poisoning by skeletal muscle relaxants [neuromuscular blocking agents] NOS Codes T48.1X1A..., initial encounterT48.1X1D..., subsequent encounterT48.1X1S..., sequela