M21.0
Header — not billableValgus deformity, not elsewhere classified
The ICD-10 code for valgus deformity, not elsewhere classified is M21.0.
M21.0 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 5 more specific codes below.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
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.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under M21.0
- M21.00Valgus deformity, not elsewhere classified, unspecified site
- M21.02Valgus deformity, not elsewhere classified, elbownon-billable header
- M21.05Valgus deformity, not elsewhere classified, hipnon-billable header
- M21.06Valgus deformity, not elsewhere classified, kneenon-billable header
- M21.07Valgus deformity, not elsewhere classified, anklenon-billable header
Related codes in this category
- M21.1Varus deformity, not elsewhere classifiednon-billable header
- M21.2Flexion deformitynon-billable header
- M21.3Wrist or foot drop (acquired)non-billable header
- M21.4Flat foot [pes planus] (acquired)non-billable header
- M21.5Acquired clawhand, clubhand, clawfoot and clubfootnon-billable header
- M21.6Other acquired deformities of footnon-billable header
- M21.7Unequal limb length (acquired)non-billable header
- M21.8Other specified acquired deformities of limbsnon-billable header
- M21.9Unspecified acquired deformity of limb and handnon-billable header
- M21.0Valgus deformity, not elsewhere classifiednon-billable header