S81
⚠ Non-billable
Open wound of knee and lower leg
ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes
Code
S81
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Injury, Poisoning and Certain Other Consequences of External Causes
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- open fracture of knee and lower leg (S82.-)
- traumatic amputation of lower leg (S88.-)
Excludes2 — not included here, but may code together
- open wound of ankle and foot (S91.-)
Code also
- any associated wound infection
7th character
- The appropriate 7th character is to be added to each code from category S81
Frequently asked questions
What is ICD-10 code S81?
ICD-10-CM code S81 represents Open wound of knee and lower leg. It is a non-billable header code requiring a more specific subcategory in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.
Is S81 billable?
No. S81 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is S81 in?
S81 belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.
Related codes in the S81 category
S81.0
Open wound of knee
Non-billable
S81.00
Unspecified open wound of knee
Non-billable
S81.01
Laceration without foreign body of knee
Non-billable
S81.02
Laceration with foreign body of knee
Non-billable
S81.03
Puncture wound without foreign body of knee
Non-billable
S81.001
Unspecified open wound, right knee
Non-billable
S81.002
Unspecified open wound, left knee
Non-billable
S81.009
Unspecified open wound, unspecified knee
Non-billable
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