- 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.
2. Diagnosis (es) must be present on any claim submitted and coded to the highest level of. specificity for that date of service. 3. Qualitative drug testing codes (G0431 & G0434) should only be billed once per patient encounter. as indicated by the code description and should only be billed at one unit.