All ICD10 Codes

S91

Non-Billable
ChapterS00–T88
Rankcategory
Official Description

Open wound of ankle, foot and toes

Use a more specific code (0 billable, 4 non-billable)
S91.0Open wound of anklehas subcodesS91.1Open wound of toe without damage to nailhas subcodesS91.2Open wound of toe with damage to nailhas subcodesS91.3Open wound of foothas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).

CH19 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
Use Additional Code
  • code to identify any retained foreign body, if applicable (Z18.-)

S90-S99 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • burns and corrosions (T20-T32)
  • fracture of ankle and malleolus (S82.-)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • open fracture of ankle, foot and toes (S92.-with 7th character B)
  • traumatic amputation of ankle and foot (S98.-)
Code Also
  • any associated wound infection

Clinical Hierarchy

BillableHas subcodes
CH19Injury, poisoning and certain other consequences of external causes (S00-T88)
S90-S99Injuries to the ankle and foot (S90-S99)
S91Open wound of ankle, foot and toesNot billable
S91.0Open wound of ankleSubcodes
S91.1Open wound of toe without damage to nailSubcodes
S91.2Open wound of toe with damage to nailSubcodes
S91.3Open wound of footSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to S91:

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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