Answer :
The correct ICD-10-CM code for severe osteoarthritis in both knees with the left side being more affected is M17.12, which represents bilateral post-traumatic osteoarthritis with the left knee being more affected.
The ICD-10-CM code for severe osteoarthritis in both knees, with the left side being worse, is M17.12. This code specifically represents bilateral post-traumatic osteoarthritis of the knee, with the left knee being more affected.
When a condition affects both sides of the body and one side is more severely impacted, it is appropriate to use a code that specifies bilateral involvement with an emphasis on the more affected side if available.
It is important to accurately code the severity and laterality of the condition, as it has implications for treatment and insurance coverage. The prefix M denotes diseases of the musculoskeletal system and connective tissue, and the remaining figures specify the exact condition and sides affected.
