L98.42 - Non-pressure chronic ulcer of back L98.4 - Non-pressure chronic ulcer of skin, not elsewhere classified L98.42 - Non-pressure chronic ulcer of back
L98.421 - Non-pressure chronic ulcer of back limited to breakdown of skin L98.422 - Non-pressure chronic ulcer of back with fat layer exposed L98.423 - Non-pressure chronic ulcer of back with necrosis of muscle L98.424 - Non-pressure chronic ulcer of back with necrosis of bone L98.429 - Non-pressure chronic ulcer of back with unspecified severity