Unequal limb length (acquired), left femur

This code signifies an acquired discrepancy in the length of the left femur, meaning the left thigh bone is either longer or shorter than the right, and this difference developed after birth. This condition can lead to gait abnormalities, back pain, and compensatory scoliosis.

Apply this code when documentation clearly indicates an acquired unequal length of the left femur, often measured in centimeters or millimeters. This typically applies to patients presenting with limping, pelvic tilt, or functional scoliosis attributed to a leg length difference originating from trauma, surgery, or disease processes affecting the left femur.

• Ensure documentation specifies "acquired" and laterality (left femur) to differentiate from congenital conditions.
• Do not confuse with codes for unequal limb length affecting the tibia or other bones; this code is specific to the femur.
• Consider sequencing this code as a secondary diagnosis if the primary reason for the encounter is a complication arising from the limb length discrepancy.