M62.1 - Other rupture of muscle (nontraumatic)
M62.12 - Other rupture of muscle (nontraumatic), upper arm
M62.121 - Other rupture of muscle (nontraumatic), right upper arm
M62.122 - Other rupture of muscle (nontraumatic), left upper arm
M62.129 - Other rupture of muscle (nontraumatic), unspecified upper arm