Blister (nonthermal) of anus, subsequent encounter

This code signifies a non-thermal blister formation specifically located in the anal region. It indicates a lesion characterized by a fluid-filled sac on the skin or mucous membrane, not caused by heat or cold exposure. The "D" suffix denotes a subsequent encounter, meaning the patient is receiving follow-up care for this condition after the initial treatment phase.

Use this code for patients presenting for ongoing management, evaluation, or treatment of a non-thermal blister of the anus. This would include visits for wound care, re-evaluation of healing, or assessment of complications related to a previously diagnosed anal blister. It is appropriate when the initial acute phase of the condition has passed.

• Ensure the documentation clearly specifies a non-thermal etiology for the blister.
• Verify that the encounter is for follow-up care, not the initial diagnosis or active treatment of a new blister.
• Look for documentation of the specific anatomical site (anus) to differentiate from other integumentary blisters.