M66.83 Spontaneous rupture of other tendons, forearmNon-billable header with 3 child codes.
M66.831 Spontaneous rupture of other tendons, right forearmM66.832 Spontaneous rupture of other tendons, left forearmM66.839 Spontaneous rupture of other tendons, unspecified forearmM62.1 Other rupture of muscle (nontraumatic) ("rupture of tendon (M66.-)")M66.819 Spontaneous rupture of other tendons, unspecified shoulderM66.82 Spontaneous rupture of other tendons, upper armM66.821 Spontaneous rupture of other tendons, right upper armM66.822 Spontaneous rupture of other tendons, left upper armM66.829 Spontaneous rupture of other tendons, unspecified upper armM66.83 Spontaneous rupture of other tendons, forearm (this code)M66.831 Spontaneous rupture of other tendons, right forearmM66.832 Spontaneous rupture of other tendons, left forearmM66.839 Spontaneous rupture of other tendons, unspecified forearmM66.84 Spontaneous rupture of other tendons, handM66.841 Spontaneous rupture of other tendons, right hand