ICD-10-CM > S00-T88 > S30-S39 > S39 > S39.0 > S39.01 > S39.012 S39.012 Strain of muscle, fascia and tendon of lower back Non-Billable/Non-Specific Codes S39.012A..., initial encounterS39.012D..., subsequent encounterS39.012S..., sequela