ICD-10-CM > R00-R99 > R40-R46 > R40 > R40.2 > R40.21 > R40.212 R40.212 Coma scale, eyes open, to pain Non-Billable/Non-Specific Applicable To Coma scale eye opening score of 2 Codes R40.2120..., unspecified timeR40.2121..., in the field [EMT or ambulance]R40.2122..., at arrival to emergency departmentR40.2123..., at hospital admissionR40.2124..., 24 hours or more after hospital admission