ICD-10 code M23.222 for Derangement of posterior horn of medial meniscus due to old tear or injury, left knee is a medical classification as listed by WHO under the range -Other joint disorders .

For example, “If after query, the physician confirms that the documented posterior horn medial meniscus tear is the result of an old injury, assign from category M23.22x” (Derangement of posterior horn of medial meniscus due to old tear or injury), the AHA Coding Clinic advised.