ICD-10-CM > R00-R99 > R40-R46 > R40 > R40.2 > R40.21 R40.21 Coma scale, eyes open Non-Billable/Non-Specific Codes R40.211Coma scale, eyes open, neverR40.2110..., 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 admissionR40.212Coma scale, eyes open, to painR40.2120..., 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 admissionR40.213Coma scale, eyes open, to soundR40.2130..., unspecified timeR40.2131..., in the field [EMT or ambulance]R40.2132..., at arrival to emergency departmentR40.2133..., at hospital admissionR40.2134..., 24 hours or more after hospital admissionR40.214Coma scale, eyes open, spontaneousR40.2140..., unspecified timeR40.2141..., in the field [EMT or ambulance]R40.2142..., at arrival to emergency departmentR40.2143..., at hospital admissionR40.2144..., 24 hours or more after hospital admission