Blister (nonthermal) of unsp back wall of thorax, subs

This code describes a non-thermal blister located on an unspecified area of the back wall of the thorax. This injury is not caused by heat, cold, or chemicals, but rather by other mechanisms such as friction or pressure.

Use this code for follow-up encounters for a patient presenting with a non-thermal blister on their back, specifically on the thoracic region. This includes situations where the patient is receiving continued care, monitoring, or treatment for the initial blister.

• Ensure documentation clearly states the blister is non-thermal and located on the back wall of the thorax.
• Verify the encounter is a subsequent visit for the same injury, not the initial presentation.
• If the specific location on the back wall of the thorax is known (e.g., scapular region), a more specific code should be used.