Blister (nonthermal) of unspecified part of head, sequela

This code signifies a non-thermal blister located anywhere on the head, including the scalp, face, or neck, when the specific location is not documented. The "S" at the end indicates that this is a sequela code, meaning it describes a residual effect or complication of an earlier injury or condition, not the acute event itself.

Use this code when a patient presents with a chronic or residual non-thermal blister on the head, and the precise anatomical site (e.g., eyelid, lip, ear) is not specified in the medical record. Documentation should clearly indicate that the blister is a long-term consequence of a previous injury or condition, rather than an acute presentation.

• Ensure documentation explicitly states the blister is non-thermal and a sequela.
• Avoid using this code if a more specific anatomical site on the head is documented (e.g., S00.12XS for eyelid).
• Always sequence this code after the code for the original injury or condition that led to the sequela, if applicable and still being treated.