S80.00 Contusion of unspecified kneeNon-billable ICD-10-CM code.
M23 Internal derangement of knee ("current injury - see injury of knee and lower leg (S80-S89)")S80 Superficial injury of knee and lower legS80.0 Contusion of kneeS80.00 Contusion of unspecified knee (this code)S80.00XA Contusion of unspecified knee, initial encounterS80.00XD Contusion of unspecified knee, subsequent encounterS80.00XS Contusion of unspecified knee, sequelaS80.01 Contusion of right kneeS80.01XA Contusion of right knee, initial encounter