- A bladder ultrasound is performed and if any urine is present the patient is asked to void into a jug and this is measured. The difference between the volume in the bladder according to the scan and the volume of voided urine gives the residual volume;
It might be best to start by showing you exactly where these new G codes will go on the claim form. See pic below. Where the codes go. Highlights (refer to the pic above of a physical therapy billing g codes on a claim): 1  The G codes go in the same column as your CPT codes but do not carry with it any charges. 2  The C modifier goes into one of the four âmodifiersâ column.
use G modifiers to alert Medicare when they bill for services or items that they expect to. be denied as either not reasonable and necessary (GA and GZ modifiers) or because they. are not covered by Medicare (GY and GX modifiers). In a 2009 report, the Office of Inspector General (OIG) raised concerns about the use of.