Prostate specific antigen (PSA), quantitation of 2 or more fractions of PSA and any derived index, in the monitoring of previously diagnosed prostatic disease, including, if performed, a test described in item 66656, if the current PSA level lies at: (a) more than 2.0 ug/L but less than or equal to 5.5 ug/L for patients with a family history of prostate cancer; or (b) more than 3.0 ug/L but less than or equal to 5.5 ug/L for patients who are at least 50 years of age but under 70 years of age; or (c) more than 5.5 ug/L but less than or equal to 10.0 ug/L for patients who are at least 70 years of age For any particular patient, applicable not more than 4 times in 11 months