Corrosions involving 70-79% of body surface

• birth trauma (P10-P15)
• obstetric trauma (O70-O71)

code to identify any retained foreign body, if applicable (Z18.-)

• Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
• The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

• burns (thermal) from electrical heating appliances
• burns (thermal) from electricity
• burns (thermal) from flame
• burns (thermal) from friction
• burns (thermal) from hot air and hot gases
• burns (thermal) from hot objects
• burns (thermal) from lightning
• burns (thermal) from radiation
• chemical burn [corrosion] (external) (internal)
• scalds

• erythema [dermatitis] ab igne (L59.0)
• radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
• sunburn (L55.-)

This category is to be used as the primary code only when the site of the corrosion is unspecified. It may be used as a supplementary code with categories T20-T25 when the site is specified.