Question: The urologist ordered a 24-hour urine collection to assess calcium, oxalate, citrate, magnesium, uric acid, pH, total volume, sodium, phosphorus, and protein levels. Is there a panel code to use or should these be billed out separately? Arizona Subscriber Answer: The current CPT® manual does not include a single code that represents all the panels you mention, so you will need to report each one individually using the following codes: