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S91

Non-billable

Open wound of ankle, foot and toes

S91 is the ICD-10-CM code for Open wound of ankle, foot and toes. It is a non-billable category code — use a more specific child code such as S91.0 for billing.

Status
Header (non-billable)
Chapter
S00-T88
Subcodes
4
Edition
FY2026

S00-T88 Injury, poisoning and certain other consequences of external causes

What this means — in plain language

MedlinePlus · NIH

Your ankle bone and the ends of your two lower leg bones make up the ankle joint. Your ligaments, which connect bones to one another, stabilize and support it. Your muscles and tendons move it. The most common ankle problems are sprains and fractures (broken bones). A sprain is an injury to the ligaments. It may take a few weeks to many months to heal completely. A fracture is a break in a bone. You can also injure…

Read more about Ankle Injuries and Disorders at MedlinePlus ↗
Foot Injuries and Disorders ↗Wounds and Injuries ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • •open fracture of ankle, foot and toes (S92.-with 7th character B)
  • •traumatic amputation of ankle and foot (S98.-)

Notes

  • •any associated wound infection

Frequently asked questions

What is ICD-10 code S91?
S91 is the ICD-10-CM code for "Open wound of ankle, foot and toes". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is S91 a billable code?
No — S91 is a non-billable header code. Use a more specific child code (such as S91.0) for billing.
What are the subcodes of S91?
S91 has 4 more specific child codes, including S91.0, S91.1, S91.2.
What is excluded from S91?
Excludes1 (not coded here): open fracture of ankle, foot and toes (S92.-with 7th character B); traumatic amputation of ankle and foot (S98.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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