Percentage of Stage 2, 3, or 4 pressure ulcers* (not on the lower extremity) among patients age 18 or older that achieve healing or closure within 6 months, stratified by the Wound Healing Index (WHI). Healing or closure may occur by delayed secondary intention or may be the result of surgical intervention (e.g. rotational flap or skin graft). Lower extremity pressure ulcers are not included in this measure because they commonly overlap with arterial and diabetic foot ulcers and require a separate risk stratification model.