Mechanical low back pain icd 10 July 8, 2019 16 32 64 128 Chronic mechanical low back pain icd 10 Acute mechanical low back pain icd 10 Mechanical low back pain secondary to muscle tightness icd 10 Mechanical low back pain secondary to muscle spasm icd 10 Mechanical low back pain secondary to muscle imbalance icd 10 Lower back icd 10