MCMCB Pro
S20.304D

S20.304DUnspecified superficial injuries of middle front wall of thorax, subsequent encounter

Billable / specific codeICD-10-CMPOA exempt

S20.304D is a billable, specific ICD-10-CM code for unspecified superficial injuries of middle front wall of thorax, 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 S20

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

S20.304D 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

S20.304D is named in 5 Medicare coverage policies 5 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A52438Billing and Coding: Tetanus Immunization
  • A53057Billing and Coding: Home Health Occupational Therapy
  • A53058Billing and Coding: Home Health Physical Therapy
  • A56459Billing and Coding: Debridement Services

Related codes at this level

Codes that share S20.304. If S20.304D is not quite right, the correct code is usually one of these.

Questions about S20.304D

Is S20.304D a billable ICD-10-CM code?
Yes. S20.304D is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S20.304D 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.