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T36.6

T36.6Poisoning by, adverse effect of and underdosing of rifampicins

Non-billable headerICD-10-CM

T36.6 is a non-billable header ICD-10-CM code for poisoning by, adverse effect of and underdosing of rifampicins. 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 T36

A
initial encounter
D
subsequent encounter
S
sequela

Other codes that can never be billed with T36.6

These codes carry an Excludes1 note pointing at T36.6. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T36.6 alone.

  • T37.1Poisoning by, adverse effect of and underdosing of antimycobacterial drugs

Risk adjustment

T36.6 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 T36.6

1 child code. Green means billable.

Related codes at this level

Codes that share T36. If T36.6 is not quite right, the correct code is usually one of these.

Questions about T36.6

Is T36.6 a billable ICD-10-CM code?
No. T36.6 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does T36.6 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).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.