- 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.
If the patient is ONLY seen for the flu shot, then you would simply bill those two codes. If the patient had an exam on the same visit you can bill an E&M code as well and Medicare will pay them all separately without any modifiers necessary. Just remember to put your V04.81 (ICD10 Z23) diagnosis primary on the Q-code and the G-code and your medical diagnosis on the E&M.