- 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.
Functional Reporting Codes â G-codes. G-codes are used to report a beneficiaryâs functional limitation being treated and note whether the report is on the beneficiaryâs current status, projected goal status, or discharge status. There are 42 functional G-codes that are comprised of 14 functional code sets with three types of codes in each set.