M23
Header — not billable
Internal derangement of knee
Internal derangement of knee
M23 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
Inclusion & exclusion notes
Excludes 1 (mutually exclusive — never code together)
- ankylosis (M24.66)
- deformity of knee (M21.-)
- osteochondritis dissecans (M93.2)
Excludes 2 (not included here, but may be coded together if both present)
- 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)