R40.23 — Coma scale, best motor response
R40.23 is a non-billable header ICD-10-CM code for coma scale, best motor response. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The following appropriate 7th character is to be added to subcategory R40.23-:
- 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
Other codes that can never be billed with R40.23
These codes carry an Excludes1 note pointing at R40.23. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R40.23 alone.
- R40.2ANontraumatic coma due to underlying condition
Risk adjustment
R40.23 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code to one of these instead R40.23
6 child codes. Green means billable.
- R40.231Coma scale, best motor response, none
- R40.232Coma scale, best motor response, extension
- R40.233Coma scale, best motor response, abnormal flexion
- R40.234Coma scale, best motor response, flexion withdrawal
- R40.235Coma scale, best motor response, localizes pain
- R40.236Coma scale, best motor response, obeys commands
Related codes at this level
Codes that share R40.2. If R40.23 is not quite right, the correct code is usually one of these.
Questions about R40.23
- Is R40.23 a billable ICD-10-CM code?
- No. R40.23 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does R40.23 sit in the tabular list?
- Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46).