M23.642 Other spontaneous disruption of lateral collateral ligament of left 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)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 717.89 Other internal derangement of knee (approximate)

Code annotations containing back-references to M23.642

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

• M23.631 Other spontaneous disruption of medial collateral ligament of right knee
• M23.632 Other spontaneous disruption of medial collateral ligament of left knee
• M23.639 Other spontaneous disruption of medial collateral ligament of unspecified knee
• M23.64 Other spontaneous disruption of lateral collateral ligament of knee
• M23.641 Other spontaneous disruption of lateral collateral ligament of right knee
• M23.642 Other spontaneous disruption of lateral collateral ligament of left knee (this code)
• M23.649 Other spontaneous disruption of lateral collateral ligament of unspecified knee
• M23.67 Other spontaneous disruption of capsular ligament of knee
• M23.671 Other spontaneous disruption of capsular ligament of right knee
• M23.672 Other spontaneous disruption of capsular ligament of left knee
• M23.679 Other spontaneous disruption of capsular ligament of unspecified knee