ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.2 > S20.21 S20.21 Contusion of front wall of thorax Non-Billable/Non-Specific Codes S20.211Contusion of right front wall of thoraxS20.211A..., initial encounterS20.211D..., subsequent encounterS20.211S..., sequelaS20.212Contusion of left front wall of thoraxS20.212A..., initial encounterS20.212D..., subsequent encounterS20.212S..., sequelaS20.213Contusion of bilateral front wall of thoraxS20.213A..., initial encounterS20.213D..., subsequent encounterS20.213S..., sequelaS20.214Contusion of middle front wall of thoraxS20.214A..., initial encounterS20.214D..., subsequent encounterS20.214S..., sequelaS20.219Contusion of unspecified front wall of thoraxS20.219A..., initial encounterS20.219D..., subsequent encounterS20.219S..., sequela