ICD-10-CM > S00-T88 > S20-S29 > S29 > S29.0 > S29.01 S29.01 Strain of muscle and tendon of thorax Non-Billable/Non-Specific Codes S29.011Strain of muscle and tendon of front wall of thoraxS29.011A..., initial encounterS29.011D..., subsequent encounterS29.011S..., sequelaS29.012Strain of muscle and tendon of back wall of thoraxS29.012A..., initial encounterS29.012D..., subsequent encounterS29.012S..., sequelaS29.019Strain of muscle and tendon of unspecified wall of thoraxS29.019A..., initial encounterS29.019D..., subsequent encounterS29.019S..., sequela