Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes S00-T88 – Injury, poisoning and certain other consequences of external causes (S00-T88) > 2024 ICD-10-CM Codes S20-S29 – Injuries to the thorax (S20-S29) > 2024 ICD-10-CM Codes S21 – Open wound of thorax (S21) > 2024 ICD-10-CM Codes S21.0 – Open wound of breast (S21.0) > 2024 ICD-10-CM Codes S21.05 – Open bite of breast (S21.05)