Is T53 a billable ICD-10-CM code?

No. T53 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does T53 sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Toxic effects of substances chiefly nonmedicinal as to source (T51-T65).

T53

T53 — Toxic effect of halogen derivatives of aliphatic and aromatic hydrocarbons

Non-billable headerICD-10-CM

T53 is a non-billable header ICD-10-CM code for toxic effect of halogen derivatives of aliphatic and aromatic hydrocarbons. 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 T53

A: initial encounter
D: subsequent encounter
S: sequela

Other codes that can never be billed with T53

These codes carry an Excludes1 note pointing at T53. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T53 alone.

T52Toxic effect of organic solvents
T59Toxic effect of other gases, fumes and vapors
T60.1Toxic effect of halogenated insecticides

Risk adjustment

T53 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 T53

9 child codes. Green means billable.

Questions about T53

Is T53 a billable ICD-10-CM code?: No. T53 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does T53 sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Toxic effects of substances chiefly nonmedicinal as to source (T51-T65).