Corrosion of unspecified degree of scalp [any part], sequela

This code signifies a long-term consequence or scar from a chemical burn to the scalp, where the specific severity of the original burn is not documented. It indicates that the acute injury has resolved, but residual effects persist.

Apply this code when documenting a patient presenting with a chronic condition, such as scarring, alopecia, or altered skin texture, directly attributable to a past chemical burn on any part of the scalp. This is appropriate when the initial burn's degree was not specified in the medical record.

• Always ensure the "S" (sequela) seventh character is appended for conditions that are residual effects of a healed injury.
• Do not use this code for acute chemical burns; those require codes from the T20.4- series without the "S" seventh character.
• If the specific degree of the original chemical burn to the scalp is known and documented, a more precise sequela code should be used.