S27.321 — Contusion of lung, unilateral
S27.321 is a non-billable header ICD-10-CM code for contusion of lung, unilateral. 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 S27
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
S27.321 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.
How S27.321 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to S27.321.
- Contusion›lung›unilateral
- Injury›intrathoracic›lung›contusion›unilateral
Code to one of these instead S27.321
3 child codes. Green means billable.
Related codes at this level
Codes that share S27.32. If S27.321 is not quite right, the correct code is usually one of these.
Questions about S27.321
- Is S27.321 a billable ICD-10-CM code?
- No. S27.321 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does S27.321 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).