S99.9
Header — not billableUnspecified injury of ankle and foot
The ICD-10 code for unspecified injury of ankle and foot is S99.9.
S99.9 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 2 more specific codes below.
Clinical notes
7th character definitions
These definitions specify what each valid 7th-character value means for codes in this category.
- [object Object]
7th character note
This category requires a 7th character to indicate additional clinical detail (e.g. encounter type: initial, subsequent, sequela). The code is incomplete without it.
- The appropriate 7th character is to be added to each code from subcategory S99.9
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.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •This category requires a 7th character. Documentation should clearly indicate the episode of care (initial encounter, subsequent encounter, or sequela).
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- S99.0Physeal fracture of calcaneusnon-billable header
- S99.1Physeal fracture of metatarsalnon-billable header
- S99.2Physeal fracture of phalanx of toenon-billable header
- S99.8Other specified injuries of ankle and footnon-billable header
- S99.9Unspecified injury of ankle and footnon-billable header