MCMCB Pro
S21.102

S21.102Unspecified open wound of left front wall of thorax without penetration into thoracic cavity

Non-billable headerICD-10-CMleft

S21.102 is a non-billable header ICD-10-CM code for unspecified open wound of left front wall of thorax without penetration into thoracic cavity. 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 S21

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

S21.102 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 S21.102

3 child codes. Green means billable.

Related codes at this level

Codes that share S21.10. If S21.102 is not quite right, the correct code is usually one of these.

Questions about S21.102

Is S21.102 a billable ICD-10-CM code?
No. S21.102 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does S21.102 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).
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.