ICD-10-CM > S00-T88 > T80-T88 > T88 > T88.5 > T88.53 T88.53 Unintended awareness under general anesthesia during procedure Non-Billable/Non-Specific Type 2 Excludes personal history of unintended awareness under general anesthesia (Z92.84) Codes T88.53XA..., initial encounterT88.53XD..., subsequent encounterT88.53XS..., sequela