- 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.
Medicare ABN Specific Modifiers â GA, GX, GY, GZ. We get a lot of questions at our medical billing company about which modifiers to use when submitting charges to Medicare. Specifically, we are often asked how to indicate whether or not an ABN (Advanced Beneficiary Notice) was given to the patient. These are the top 4 Medicare modifiers we use. GA Modifier: Waiver of Liability Statement Issued as Required by Payer Policy. This modifier indicates that an ABN is on file and allows the provider to bill the patient if not covered by Medicare. Use of this modifier ensures that upon denial, Medicare will