The National Pressure Ulcer Advisory Panel redefined the definition of a pressure ulcer and the stages of pressure ulcers in 2007, including the original 4 stages (Non-blanchable erythema - Stage I, partial thickness – Stage II, full thickness skin loss – Stage III, and full thickness tissue loss – Stage IV) and adding 2 stages on deep tissue injury and unstageable pressure ulcers. As defined by the NPUAP, a pressure ulcer is localized injury to the skin and/or underlying tissue usually over a bony prominence, as a result of pressure, or pressure in combination with shear. - LOINC 72527-5 (Pressure ulcer stage NPUAP)

Code representing the National Pressure Ulcer Advisory Panel redefined the definition of a pressure ulcer and the stages of pressure ulcers in 2007, including the original 4 stages (Non-blanchable erythema - Stage I, partial thickness – Stage II, full thickness skin loss – Stage III, and full thickness tissue loss – Stage IV) and adding 2 stages on deep tissue injury and unstageable pressure ulcers. As defined by the NPUAP, a pressure ulcer is localized injury to the skin and/or underlying tissue usually over a bony prominence, as a result of pressure, or pressure in combination with shear. - LOINC 72527-5 (Pressure ulcer stage NPUAP)

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