Blister (nonthermal), right hip, sequela

This code indicates a non-heat-related blister located on the right hip, representing a late effect or complication of an earlier injury or condition. It signifies that the blister is no longer an acute problem but rather a residual issue from a previous insult.

Apply this code when documenting a patient presenting with a blister on the right hip that is clearly identified as a sequela, meaning it is a chronic or residual condition following an initial injury or disease process. This would be appropriate for conditions like a healed pressure ulcer leaving a chronic blister, or a blister resulting from a past allergic reaction.

• Always sequence this code after the code for the original injury or condition that caused the blister, if known and still relevant.
• Ensure documentation explicitly states "sequela" or "late effect" to support the use of the 7th character 'S'.
• Distinguish from acute blisters (e.g., from friction or contact dermatitis) which would use different codes.