Is T31 a billable ICD-10-CM code?

No. T31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does T31 sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Burns and corrosions of multiple and unspecified body regions (T30-T32).

T31

T31 — Burns classified according to extent of body surface involved

Non-billable headerICD-10-CM

T31 is a non-billable header ICD-10-CM code for burns classified according to extent of body surface involved. It cannot be billed on its own: choose one of the more specific child codes below.

Notes

Additional guidance from the ICD-10-CM tabular list.

This category is to be used as the primary code only when the site of the burn is unspecified. It should be used as a supplementary code with categories T20-T25 when the site is specified.

Other codes that can never be billed with T31

These codes carry an Excludes1 note pointing at T31. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T31 alone.

T66Radiation sickness, unspecified
T66.XXXARadiation sickness, unspecified, initial encounter
T66.XXXDRadiation sickness, unspecified, subsequent encounter
T66.XXXSRadiation sickness, unspecified, sequela

Risk adjustment

T31 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 T31

10 child codes. Green means billable.

Questions about T31

Is T31 a billable ICD-10-CM code?: No. T31 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does T31 sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Burns and corrosions of multiple and unspecified body regions (T30-T32).