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ICD-10-CM 2027

ICD-10 code for knee wound

S81.00

Unspecified open wound of knee

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Wound, open › knee”. Page updated September 29, 2026.

About coding knee wound

The ICD-10-CM code for knee wound is S81.00 (Unspecified open wound of knee).

Within S81.0, choose S81.00 (Unspecified open wound of knee) only when documentation doesn't support a more specific option: laceration without foreign body of knee (S81.01), laceration with foreign body of knee (S81.02), puncture wound without foreign body of knee (S81.03), puncture wound with foreign body of knee (S81.04) and open bite of knee (S81.05).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

More specific knee wound codes (official index)

  • bite
  • laceration
  • puncture

Common questions about knee wound ICD-10 codes

What is the ICD-10 code for knee wound?

S81.00 — Unspecified open wound of knee (a header code; report a more specific subcode).

Is S81.00 billable?

No. S81.00 is a header code. Report one of its more specific subcodes instead.