M21.759
Billable codeUnequal limb length (acquired), unspecified femur
The ICD-10 code for unequal limb length (acquired), unspecified femur is M21.759.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •Laterality-specific codes exist for this condition — confirm the affected side is documented.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- M21.751Unequal limb length (acquired), right femur
- M21.752Unequal limb length (acquired), left femur
- M21.759Unequal limb length (acquired), unspecified femur
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 73681Approximate match
Associated MS-DRGs
M21.759 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.