Blister (nonthermal) of throat, subsequent encounter

This code signifies a non-thermal blister located in the pharynx or larynx, indicating a follow-up visit for a previously diagnosed and treated condition. It describes a fluid-filled lesion in the throat not caused by heat, chemicals, or radiation, during the recovery phase.

Use this code for encounters where a patient is receiving ongoing care for a non-thermal blister of the throat, such as wound checks, medication adjustments, or monitoring for healing. Documentation should clearly state "blister of throat," specify "non-thermal," and indicate that this is not the initial treatment encounter.

• Ensure documentation specifies "subsequent encounter" to differentiate from the initial treatment.
• Distinguish from thermal burns (T28.0-T28.9) or chemical burns (T28.0-T28.9) of the throat.
• Always code the underlying cause of the blister if known and documented (e.g., viral infection, allergic reaction).