M92.21Osteochondrosis (juvenile) of carpal lunate [Kienbock]

M92.21 is the ICD-10-CM diagnosis code for osteochondrosis (juvenile) of carpal lunate [Kienbock]. It belongs to category M92 (other juvenile osteochondrosis), block M91-M94 (Chondropathies) 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 M92.2 (juvenile osteochondrosis, hand), M92.21 is specifically for osteochondrosis (juvenile) of carpal lunate [Kienbock]. Related codes cover unspecified juvenile osteochondrosis, hand (M92.20), osteochondrosis (juvenile) of metacarpal heads [Mauclaire] (M92.22) and other juvenile osteochondrosis, hand (M92.29).

To report this condition, pick the subcode that matches the documentation: M92.211 (right hand), M92.212 (left hand) and M92.219 (unspecified hand).

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