L89.1 - Pressure ulcer of back
L89.14 - Pressure ulcer of left lower back
L89.140 - Pressure ulcer of left lower back, unstageable
L89.141 - Pressure ulcer of left lower back, stage 1
L89.142 - Pressure ulcer of left lower back, stage 2
L89.143 - Pressure ulcer of left lower back, stage 3
L89.144 - Pressure ulcer of left lower back, stage 4
L89.149 - Pressure ulcer of left lower back, unspecified stage