M23.3Other meniscus derangements

M23.3 is the ICD-10-CM diagnosis code for other meniscus derangements. 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 7 subcodes must be used instead.

Within M23, choose M23.3 (Other meniscus derangements) only when documentation doesn't support a more specific option: cystic meniscus (M23.0), derangement of meniscus due to old tear or injury (M23.2), Loose body in knee (M23.4), chronic instability of knee (M23.5), other spontaneous disruption of ligament(s) of knee (M23.6), other internal derangements of knee (M23.8) and unspecified internal derangement of knee (M23.9).

To report this condition, pick the subcode that matches the documentation: M23.30 (unspecified meniscus), M23.31 (anterior horn of medial meniscus), M23.32 (posterior horn of medial meniscus), M23.33 (other medial meniscus), M23.34 (anterior horn of lateral meniscus), M23.35 (posterior horn of lateral meniscus) and M23.36 (other lateral meniscus).

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