S31

ICD-10Non-billable category

Opn wnd abdomen, lower back, pelvis and external genitals

Official ICD-10-CM descriptor (FY2026)

Open wound of abdomen, lower back, pelvis and external genitals

S31 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.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • traumatic amputation of part of abdomen, lower back and pelvis (S38.2-, S38.3)

Excludes2

Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.

  • open wound of hip (S71.00-S71.02)
  • open fracture of pelvis (S32.1--S32.9 with 7th character B)

Code also

Two codes may be needed; sequencing depends on the reason for the encounter.

  • any associated:
  • spinal cord injury (S24.0, S24.1-, S34.0-, S34.1-)
  • wound infection

7th character

  • The appropriate 7th character is to be added to each code from category S31

Permitted 7th characters

Ainitial encounter
Dsubsequent encounter
Ssequela

More specific codes under S31

Where this code sits

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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.

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