Corrosion of third degree of upper back, subs encntr

This code describes a severe burn injury affecting the full thickness of the skin and underlying tissue on the upper back. It indicates that the patient is receiving follow-up care for this specific corrosion.

Use this code for encounters where a patient is being treated for complications, healing, or long-term effects of a third-degree corrosion to the upper back, after the initial treatment has been rendered. This includes wound care, debridement, skin grafting, or management of infection during the recovery phase.

• Requires an external cause code (V00-Y99) to describe the circumstances of the corrosion.
• Do not use for initial treatment of the injury; a code with an "A" (initial encounter) seventh character would be appropriate for that.
• Distinguish between corrosion (chemical burn) and thermal burn; this code is specific to corrosion.