the report states "presents today for a cystometrofram and pressure flow studies. Evelyn's evaluation demonstrates a first sensation at 86 ccs with the first urge at 121 and capacity at 200 ccs. No uninhibited contractions are identified. Flow rate was not recorded Evidence of emptying is uncertain." The documentation includes a graph with columns marked "Time/Pves/Pabd/Pdet/VH2)/flow(zero)/Volume(zero) and IH2O. The events include cough, laugh, first sensation, first urge..." The doc is coding 51726 and 51797. The 51797 is an add-on code and 51726 does not qualify for the primary code. Are these codes correct?? What should be billed with 51797?