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A follow-up test that measures free prostate-specific antigen (free PSA) may be used to see if a prostate biopsy should be done to check for cancer. Free PSA is the percent of prostate-specific antigen that is not attached to proteins in the blood. The lower a man's free PSA percentage, the more likely he is to have prostate cancer. A man with a total PSA between 4 and 10 ng/mL may have a test to find out his free PSA, to see if cancer is likely to be present.
Prostate Screening: Prostate cancer is the most common type of cancer in men in the United States. A rectal exam and a blood test called a Prostate-Specific Antigen (PSA) test can find this cancer. The PSA test is free, and the digital exam has a 20% copay. Both are covered by Medicare once every 12 months.