S21.2
ICD-10Non-billable categoryOpen wound of back wall of thorax w/o penet thoracic cavity
Official ICD-10-CM descriptor (FY2026)
Open wound of back wall of thorax without penetration into thoracic cavity
S21.2 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.
ICD-10-CM FY2026 defines 6 codes beneath S21.2. See the ICD-10-CM index for what this site publishes.
Related codes in S21
- S21.0Open wound of breastcategory
- S21.1Open wound of front wall of thorax w/o penet thoracic cavitycategory
- S21.3Open wound of front wall of thorax w penet thoracic cavitycategory
- S21.4Open wound of back wall of thorax w penet thoracic cavitycategory
- S21.9Open wound of unspecified part of thoraxcategory
Where this code sits
- Parent code
- S21
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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.