Yes, but depending on the outcome of your treatment, you may not have 100 percent permanent disability. Once service connection is established, the VA rating for active prostate cancer is 100 percent. The rating lasts for up to six months after successfully completing cancer treatment, including radiation, chemotherapy, and/or surgery. Following that time, a C&P exam is conducted to determine what residual effects exist from the cancer or treatment, including ED, increased urinary frequency, and/or urinary incontinence.