S21.1

ICD-10Non-billable category

Open wound of front wall of thorax w/o penet thoracic cavity

Official ICD-10-CM descriptor (FY2026)

Open wound of front wall of thorax without penetration into thoracic cavity

S21.1 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Inclusion terms

Open wound of chest without penetration into thoracic cavity

ICD-10-CM FY2026 defines 6 codes beneath S21.1. See the ICD-10-CM index for what this site publishes.

Related codes in S21

Where this code sits

Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: Injuries to the thorax (S20-S29)
Parent code: S21

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.