ICD-10-CM > R00-R99 > R40-R46 > R40 > R40.2 > R40.21 > R40.211 R40.211 Coma scale, eyes open, never Non-Billable/Non-Specific Applicable To Coma scale eye opening score of 1 Codes R40.2110..., unspecified timeR40.2111..., in the field [EMT or ambulance]R40.2112..., at arrival to emergency departmentR40.2113..., at hospital admissionR40.2114..., 24 hours or more after hospital admission