Blister (nonthermal) of scalp, sequela

This code describes the long-term effects or complications arising from a non-thermal blister on the scalp. This could include scarring, chronic pain, or other persistent issues directly attributable to the original blister injury, occurring after the acute phase has resolved.

Apply this code when documenting a patient presenting with a current condition that is a direct consequence of a previously healed or resolved non-thermal scalp blister. Documentation should clearly link the current sequela to the prior blister, often indicating a chronic or residual state.

• Requires a seventh character 'S' to indicate sequela, signifying a late effect.
• Always sequence the sequela code first, followed by any code(s) for the specific residual condition(s) being treated.
• Distinguish from acute blister codes (S00.02XA, S00.02XD) which are used for the initial encounter or subsequent encounters for active treatment of the blister itself.