Is S25 a billable ICD-10-CM code?

No. S25 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does S25 sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the thorax (S20-S29).

S25

S25 — Injury of blood vessels of thorax

Non-billable headerICD-10-CM

S25 is a non-billable header ICD-10-CM code for injury of blood vessels of thorax. 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 S25

A: initial encounter
D: subsequent encounter
S: sequela

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

any associated open wound (S21.-)

Other codes that can never be billed with S25

These codes carry an Excludes1 note pointing at S25. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading S25 alone.

S35.0Injury of abdominal aorta
S35.1Injury of inferior vena cava

Risk adjustment

S25 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 S25

8 child codes. Green means billable.

Questions about S25

Is S25 a billable ICD-10-CM code?: No. S25 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does S25 sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the thorax (S20-S29).