tenotomy tenotomy a tenotomy is a surgical act which involves the division of a tendon. it and related procedures are also referred to as tendon release, tendon lengthening, and heel-cord release. tenotomyicd-9-cm83.13ops-301 code5-10b, 5-814, 5-840, 5-851 when it involves the achilles tendon, it is called "achillotenotomy". it has been used in the treatment of cerebral palsy. it has also been used for hammer toe. as an alternative to slap lesion labral repair, the tendon of the long head of the bicep can be released. achilles tenotomy is commonly used as part of the ponseti method of treating clubfoot.