S81.0Non-Billable (Header)Open wound of kneeChild CodesS81.00Unspecified open wound of kneeS81.01Laceration without foreign body of kneeS81.02Laceration with foreign body of kneeS81.03Puncture wound without foreign body of kneeS81.04Puncture wound with foreign body of kneeS81.05Open bite of kneeCode Hierarchy└S81Open wound of knee and lower leg└S81.0Open wound of knee└S81.0Open wound of knee