M23.259 Derangement of posterior horn of lateral meniscus due to old tear or injury, unspecified knee

Billable ICD-10-CM code, FY2026.

Applies from M23 Internal derangement of knee

Excludes1 (never code together)

• ankylosis (M24.66)
• deformity of knee (M21.-)
• osteochondritis dissecans (M93.2)

Excludes2 (not included here)

• current injury - see injury of knee and lower leg (S80-S89)
• recurrent dislocation or subluxation of joints (M24.4)
• recurrent dislocation or subluxation of patella (M22.0-M22.1)

Applies from M23.2 Derangement of meniscus due to old tear or injury

Applicable to

• Old bucket-handle tear

MS-DRG index

Defines the logic of DRG(s) 562-563 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 717.43 Derangement of posterior horn of lateral meniscus (approximate)

Code annotations containing back-references to M23.259

Back-references to M23.2

• Type 1 Excludes: S83.2 Tear of meniscus, current injury ("old bucket-handle tear (M23.2)")

Back-references to M23

• Type 2 Excludes: M24.1 Other articular cartilage disorders ("internal derangement of knee (M23.-)")
• Type 2 Excludes: S83 Dislocation and sprain of joints and ligaments of knee ("internal derangement of knee (M23.-)")

Nearby codes

• M23.242 Derangement of anterior horn of lateral meniscus due to old tear or injury, left knee
• M23.249 Derangement of anterior horn of lateral meniscus due to old tear or injury, unspecified knee
• M23.25 Derangement of posterior horn of lateral meniscus due to old tear or injury
• M23.251 Derangement of posterior horn of lateral meniscus due to old tear or injury, right knee
• M23.252 Derangement of posterior horn of lateral meniscus due to old tear or injury, left knee
• M23.259 Derangement of posterior horn of lateral meniscus due to old tear or injury, unspecified knee (this code)
• M23.26 Derangement of other lateral meniscus due to old tear or injury
• M23.261 Derangement of other lateral meniscus due to old tear or injury, right knee
• M23.262 Derangement of other lateral meniscus due to old tear or injury, left knee
• M23.269 Derangement of other lateral meniscus due to old tear or injury, unspecified knee
• M23.3 Other meniscus derangements