T49.8 — Poisoning by, adverse effect of and underdosing of other topical agents
T49.8 is a non-billable header ICD-10-CM code for poisoning by, adverse effect of and underdosing of other topical agents. 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 T49
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Poisoning by, adverse effect of and underdosing of spermicides
Other codes that can never be billed with T49.8
These codes carry an Excludes1 note pointing at T49.8. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T49.8 alone.
- T38.0Poisoning by, adverse effect of and underdosing of glucocorticoids and synthetic analogues
Risk adjustment
T49.8 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
T49.8 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 T49.8
1 child code. Green means billable.
Related codes at this level
Codes that share T49. If T49.8 is not quite right, the correct code is usually one of these.
- T49.0Poisoning by, adverse effect of and underdosing of local antifungal, anti-infective and anti-inflammatory drugs
- T49.1Poisoning by, adverse effect of and underdosing of antipruritics
- T49.2Poisoning by, adverse effect of and underdosing of local astringents and local detergents
- T49.3Poisoning by, adverse effect of and underdosing of emollients, demulcents and protectants
- T49.4Poisoning by, adverse effect of and underdosing of keratolytics, keratoplastics, and other hair treatment drugs and preparations
- T49.5Poisoning by, adverse effect of and underdosing of ophthalmological drugs and preparations
- T49.6Poisoning by, adverse effect of and underdosing of otorhinolaryngological drugs and preparations
- T49.7Poisoning by, adverse effect of and underdosing of dental drugs, topically applied
- T49.9Poisoning by, adverse effect of and underdosing of unspecified topical agent
Questions about T49.8
- Is T49.8 a billable ICD-10-CM code?
- No. T49.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does T49.8 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).