Hello, I'm a fairly new coder for an RCM company and I have recently been assigned a nuclear medicine client. I was hoping to get some credible resources where I may find it stated exactly how to bill units for 77300 for RPT. For external beam, it seems to be billed 1 units per arc/beam, but for RPT I cannot find a statement anywhere that corroborates my physician's statement that 77300 should be billed per region of treatment.
The typical documentation will state "The prescribed dose of Lu-177 was chosen based on the results of the [...] trial. Models suggest this results in [range] Gy of radiation to the kidneys and [range] Gy to somatostatin expressing tumors." The physician also states that they have always previously billed 9 units for 77300 based on the treatment regions whole body, tumors, submandibular gland, parotid gland, left kidney, right kidney, liver, spleen, and one other region of which I am unsure. However, as seen in the documentation above, the only regions addressed are the tumor(s) and the right and left kidney.
I have read through the billing strategies (
https://rrp.cancer.gov/working_groups/20200123_Graves_RPT-Billing.pdf) and reimbursement approaches (
https://jnm.snmjournals.org/content/62/Supplement_3/48S) for RPT but it is very dense for a non-specialist coder to parse, and I do not seem to find how many units are being billed per 77300. Although both sources listed above are credible for their medicine, I have noted that they are not authored by credentialed coders/billers, a note that the author themselves make at one point.
TLDR: can anyone link me to a reputable coding source where it is stated how to bill units of 77300 specifically for RPT?
Thank you!