Myalgia upper back icd 10 July 8, 2019 16 32 64 128 Myalgia upper back icd 10 cm code Myalgia upper back icd 10 cm Icd 10 code myalgia upper back Myalgia lumbar icd 10 Myalgia and myositis unspecified icd 10 Myalgia site unspecified