M62.1 - Other rupture of muscle (nontraumatic)
M62.17 - Other rupture of muscle (nontraumatic), ankle and foot
M62.171 - Other rupture of muscle (nontraumatic), right ankle and foot
M62.172 - Other rupture of muscle (nontraumatic), left ankle and foot
M62.179 - Other rupture of muscle (nontraumatic), unspecified ankle and foot