ICD-10-CM > S00-T88 > S20-S29 > S20 > S20.9 > S20.97 S20.97 Other superficial bite of unspecified parts of thorax Non-Billable/Non-Specific Type 1 Excludes open bite of thorax NOS (S21.95) Codes S20.97XA..., initial encounterS20.97XD..., subsequent encounterS20.97XS..., sequela