T40.5 — Poisoning by, adverse effect of and underdosing of cocaine
T40.5 is a non-billable header ICD-10-CM code for poisoning by, adverse effect of and underdosing of cocaine. 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 T40
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes2 inherited from the categories above T40.5
Also inherited, and the opposite of Excludes1: these conditions are not part of T40.5, but a patient can have both, so you may code both.
Other codes that can never be billed with T40.5
These codes carry an Excludes1 note pointing at T40.5. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T40.5 alone.
Risk adjustment
T40.5 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 history
T40.5 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead T40.5
1 child code. Green means billable.
Related codes at this level
Codes that share T40. If T40.5 is not quite right, the correct code is usually one of these.
- T40.0Poisoning by, adverse effect of and underdosing of opium
- T40.1Poisoning by and adverse effect of heroin
- T40.2Poisoning by, adverse effect of and underdosing of other opioids
- T40.3Poisoning by, adverse effect of and underdosing of methadone
- T40.4Poisoning by, adverse effect of and underdosing of other synthetic narcotics
- T40.6Poisoning by, adverse effect of and underdosing of other and unspecified narcotics
- T40.7Poisoning by, adverse effect of and underdosing of cannabis (derivatives)
- T40.8Poisoning by and adverse effect of lysergide [LSD]
- T40.9Poisoning by, adverse effect of and underdosing of other and unspecified psychodysleptics [hallucinogens]
Questions about T40.5
- Is T40.5 a billable ICD-10-CM code?
- No. T40.5 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does T40.5 sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50).