M23.8 - Other internal derangements of knee M23 - Internal derangement of knee M23.8 - Other internal derangements of knee M23.8X - Other internal derangements of knee
M23.8X1 - Other internal derangements of right knee M23.8X2 - Other internal derangements of left knee M23.8X9 - Other internal derangements of unspecified knee