All ICD10 Codes

S99.91

Non-Billable
ChapterS00–T88
Ranksubcategory
Official Description

Unspecified injury of ankle

Use a more specific code (3 billable)
S99.911Unspecified injury of right ankleS99.912Unspecified injury of left ankleS99.919Unspecified injury of unspecified ankle
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).
General instructions are available for the parent sections:
View CH19 NotesView S90-S99 Notes

Clinical Hierarchy

BillableHas subcodes
CH19Injury, poisoning and certain other consequences of external causes (S00-T88)
S90-S99Injuries to the ankle and foot (S90-S99)
S99Other and unspecified injuries of ankle and foot
S99.9Unspecified injury of ankle and foot
S99.91Unspecified injury of ankleNot billable
S99.911Unspecified injury of right ankleBillable
S99.912Unspecified injury of left ankleBillable
S99.919Unspecified injury of unspecified ankleBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to S99.91:

blockS90-S99
Injuries to the ankle and foot (S90-S99)
View context instructions
chapterCH19
Injury, poisoning and certain other consequences of external causes (S00-T88)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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