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 T20-T25 – Burns and corrosions of external body surface, specified by site (T20-T25) > 2024 ICD-10-CM Codes T20 – Burn and corrosion of head, face, and neck (T20) > 2024 ICD-10-CM Codes T20.4 – Corrosion of unspecified degree of head, face, and neck (T20.4) > 2024 ICD-10-CM Codes T20.49 – Corrosion of unspecified degree of multiple sites of head, face, and neck (T20.49)