T78
T78 — Adverse effects, not elsewhere classified
Non-billable headerICD-10-CM
T78 is a non-billable header ICD-10-CM code for adverse effects, not elsewhere classified. 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 appropriate 7th character is to be added to each code from category T78
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Other codes that can never be billed with T78
These codes carry an Excludes1 note pointing at T78. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T78 alone.
Risk adjustment
T78 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 T78
6 child codes. Green means billable.
Questions about T78
- Is T78 a billable ICD-10-CM code?
- No. T78 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does T78 sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Other and unspecified effects of external causes (T66-T78).