M23.9

Non-Billable

Unspecified internal derangement of knee

M23.9 should not be used for reimbursement purposes as there are multiple sub-diagnoses that fall under this code. Please refer to the sub-diagnoses below.

Related Diagnoses

  • M23.90Unspecified internal derangement of unspecified knee
  • M23.91Unspecified internal derangement of right knee
  • M23.92Unspecified internal derangement of left knee
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