Blister (nonthermal) of scrotum and testes, sequela

This code signifies a non-thermal blister affecting the scrotum and/or testes, indicating a residual effect or complication from an initial injury or condition. It describes a persistent or late-appearing manifestation of a previous blister, rather than an acute event.

Apply this code when documenting a patient presenting with a blister on the scrotum or testes that is a long-term consequence of a prior injury or condition, and is not due to heat or cold exposure. This is appropriate for follow-up encounters where the blister is no longer acute but represents a lasting impact.

• Requires a seventh character "S" to indicate sequela, meaning the blister is a late effect of an earlier injury.
• Do not use for acute, current blisters; those would require an initial encounter or subsequent encounter character.
• Always code the underlying cause of the original blister, if known and still relevant, as a primary diagnosis.