S21.309D — Unspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity, subsequent encounter
S21.309D is a billable, specific ICD-10-CM code for unspecified open wound of unspecified front wall of thorax with penetration into thoracic cavity, subsequent encounter. It is valid for submission on a claim.
7th character "D" — subsequent encounter
The appropriate 7th character is to be added to each code from category S21
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
S21.309D 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.
Medicare coverage
S21.309D is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56717Billing and Coding: Respiratory Therapy (Respiratory Care)
- A57179Billing and Coding: Transesophageal Echocardiogram
- A57326Billing and Coding: Electrocardiograms
- A57414Billing and Coding: Upper Gastrointestinal Endoscopy (Diagnostic and Therapeutic)
Related codes at this level
Codes that share S21.309. If S21.309D is not quite right, the correct code is usually one of these.
Questions about S21.309D
- Is S21.309D a billable ICD-10-CM code?
- Yes. S21.309D is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does S21.309D 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).