M25.46
Header — not billableEffusion, knee
The ICD-10 code for effusion, knee is M25.46.
M25.46 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 3 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under M25.46
Related codes in this category
- M25.40Effusion, unspecified joint
- M25.41Effusion, shouldernon-billable header
- M25.42Effusion, elbownon-billable header
- M25.43Effusion, wristnon-billable header
- M25.44Effusion, handnon-billable header
- M25.45Effusion, hipnon-billable header
- M25.47Effusion, ankle and footnon-billable header
- M25.48Effusion, other site
- M25.46Effusion, kneenon-billable header