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M21.731

Billable

Unequal limb length (acquired), right ulna

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

The right forearm bone (ulna) is shorter than the left, causing unequal limb length acquired after birth.

Coding Tips

  • •Ensure documentation specifies the right ulna and that the condition is acquired, not congenital
  • •Distinguish between ulna and radius shortening as they have different codes

Code Hierarchy

└M21Other acquired deformities of limbs└M21.7Unequal limb length (acquired)└M21.73Unequal limb length (acquired), ulna and radius└M21.731Unequal limb length (acquired), right ulna
└M21.731Unequal limb length (acquired), right ulna

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