Short Achilles tendon (acquired), left ankle

This code describes an acquired shortening of the Achilles tendon affecting the left ankle. This condition, often referred to as equinus deformity, results in limited dorsiflexion of the foot and can lead to gait abnormalities, pain, and other musculoskeletal issues. It is not present at birth but develops over time due to various factors.

Use this code when documentation clearly indicates an acquired, rather than congenital, shortening of the Achilles tendon in the patient's left ankle. This diagnosis is typically supported by physical examination findings demonstrating restricted ankle dorsiflexion, imaging studies (e.g., ultrasound, MRI) confirming tendon shortening, and a history ruling out a congenital origin.

• Differentiate carefully between acquired (M67.0-) and congenital (Q66.89) Achilles tendon shortening.
• Ensure the laterality (left ankle) is explicitly documented to support this specific code.
• Consider sequencing this code with other relevant diagnoses, such as associated gait disturbances (R26.-) or pain (M79.672).