Blister (nonthermal) of unspecified part of neck, sequela

This code signifies a non-thermal blister located on an unspecified part of the neck, indicating that the blister is a residual effect or complication of a previous injury or condition. It describes a persistent or late-appearing manifestation of an earlier event, rather than an acute injury.

Use this code when documentation specifies a blister on the neck that is explicitly noted as a sequela, meaning it's a consequence of a prior injury or disease. This applies when the original cause of the blister is no longer active, and the blister itself is a lasting effect. The "S" at the end indicates sequela.

• Ensure documentation clearly states the blister is a "sequela" or a "late effect" of a previous condition.
• Do not use for acute, current blisters; those would typically use the initial encounter or subsequent encounter codes.
• Always sequence this code after the code for the underlying condition or cause of the sequela, if known and still relevant.