MCMCB Pro
S20.374A

S20.374AOther superficial bite of middle front wall of thorax, initial encounter

Billable / specific codeICD-10-CM

S20.374A is a billable, specific ICD-10-CM code for other superficial bite of middle front wall of thorax, initial encounter. It is valid for submission on a claim.

7th character "A" — initial 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

S20.374A 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

S20.374A is named in 10 Medicare coverage policies 10 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
  • A53064Billing and Coding: Outpatient Occupational Therapy

Related codes at this level

Codes that share S20.374. If S20.374A is not quite right, the correct code is usually one of these.

Questions about S20.374A

Is S20.374A a billable ICD-10-CM code?
Yes. S20.374A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S20.374A 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.