ICD-10-CM > M00-M99 > M05-M14 > M11 > M11.8 > M11.86 M11.86 Other specified crystal arthropathies, knee Non-Billable/Non-Specific Codes M11.861Other specified crystal arthropathies, right kneeM11.862Other specified crystal arthropathies, left kneeM11.869Other specified crystal arthropathies, unspecified knee