ICD10BillableValid for clinical use

ICD-10 Code S81.809: Unspecified open wound, unspecified lower leg

S81.809 is a billable ICD-10 diagnosis code used to classify Unspecified open wound, unspecified lower leg in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Injury, poisoning and certain other consequences of external causes (S00-T88).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Injury, poisoning and certain other consequences of external causes (S00-T88).

When is it used?

  • May be used when a clinician documents unspecified open wound, unspecified lower leg in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
19Injury, poisoning and certain other consequences of external causes (S00-T88)
block
S80-S89Injuries to the knee and lower leg
category
S81Open wound of knee and lower leg
category
S81.8Open wound of lower leg
category
S81.80Unspecified open wound of lower leg
currentS81.80

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Emergency Medicine SpecialistOrthopedic Specialist

Coding guidelines

Common synonyms

Unspecified open wound, unspecified lower legUnspecified open wound

Frequently asked questions

Code details

CodeS81.809
SystemICD10
Display nameUnspecified open wound, unspecified lower leg
ChapterInjury, poisoning and certain other consequences of external causes (S00-T88)
BlockInjuries to the knee and lower leg

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code S81.809 for Unspecified open wound, unspecified lower leg | HealthAssure