Is There a Procedure for Leg Shortening?

I more than positive my left leg is slightly longer(1 cm to an inch) than the other. This has made my hips uneven and is altering my shoulder balance. I workout frequently and my left shoulder, left hip, and right abdomen muscles are constantly sore due to the imbalance. I just started stuffing my right shoe but i don't want to do this forever if there is a procedure to fix this especially If it is something insurance isn't reluctant to cover and isn't too extensive.

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