Question: True or False? Edema counts as a wound or lesion when you are answering OASIS item M0440. Answer: True. Changes in the shape of the skin surface - such as a cyst, nodule or edema - are considered skin lesions when answering M0440, the Centers for Medicare & Medicaid Services says in question and answer number 63 in the OASIS Q&As, found at www.qtso.com/hhadownload.html