M23.63Other spontaneous disruption of medial collateral ligament of knee

M23.63 is the ICD-10-CM diagnosis code for other spontaneous disruption of medial collateral ligament of knee. It belongs to category M23 (internal derangement of knee), block M20-M25 (other joint disorders) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within M23.6 (other spontaneous disruption of ligament(s) of knee), M23.63 is specifically for other spontaneous disruption of medial collateral ligament of knee. Related codes cover unspecified ligament of knee (M23.60), anterior cruciate ligament of knee (M23.61), posterior cruciate ligament of knee (M23.62), lateral collateral ligament of knee (M23.64) and capsular ligament of knee (M23.67).

To report this condition, pick the subcode that matches the documentation: M23.631 (knee), M23.632 (knee) and M23.639 (knee).

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