Tibial Torsion M21.969 736.89

• M21.961 - Unspecified acquired deformity of right lower leg
• M21.962 - Unspecified acquired deformity of left lower leg
• M21.969 - Unspecified acquired deformity of unspecified lower leg 

Tibial Torsion ICD-9

• 736.89 other acquired deformities of limbs; arm or leg, not elsewhere classified

Tibial Torsion Natural History, Etiology

• most common cause of intoeing from 1-3 y/o
• thought to be caused by intrauterine postioning

Tibial Torsion Clinical Evaluation

• thigh-foot axis, transmalleolar axis
• c/o clumsy, trips frequently

Tibial Torsion Treatment

• generally resolves spontaneously by age 4
• treated with supramaleolar osteotomy with plate fixation for ER >30 and IR >15 in pts >8yrs old

External Tibial Torsion; associated with NM disease, tends to increase with age, can lead to patelofemoral pain and patellofemoral instability