S99.91
Header — not billableUnspecified injury of ankle
The ICD-10 code for unspecified injury of ankle is S99.91.
S99.91 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 3 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- S99.92Unspecified injury of footnon-billable header
- S99.91Unspecified injury of anklenon-billable header