ICD-10-CM > M00-M99 > M15-M19 > M17 > M17.3 M17.3 Unilateral post-traumatic osteoarthritis of knee Non-Billable/Non-Specific Applicable To Post-traumatic osteoarthritis of knee NOS Codes M17.30Unilateral post-traumatic osteoarthritis, unspecified kneeM17.31Unilateral post-traumatic osteoarthritis, right kneeM17.32Unilateral post-traumatic osteoarthritis, left knee