M14.8 - Arthropathies in other specified diseases classified elsewhere
M14.86 - Arthropathies in other specified diseases classified elsewhere, knee
M14.861 - Arthropathies in other specified diseases classified elsewhere, right knee
M14.862 - Arthropathies in other specified diseases classified elsewhere, left knee
M14.869 - Arthropathies in other specified diseases classified elsewhere, unspecified knee