R40.21 is a non-billable/non-specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Coma scale, eyes open.
Seventh character note
The following appropriate 7th character is to be added to subcategory R40.21-:
Seventh character extensions
0: unspecified time
1: in the field [EMT or ambulance]
2: at arrival to emergency department
3: at hospital admission
4: 24 hours or more after hospital admission
Codes
Versions
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code