Can you bill 90966 and 99232 together

Hi Wanted to see if we are able to bill a 99232 and 90966 together. there’s a lot of issues I see with the claim as 90966 was billed at the beginning of the month vs the end of the month. pt went to the ED several times that month which claims were billed with 99232. Medicare denied claims for 99232 stating we would need to append a mod as claims are bundling.
I was told that I should use the 90970 instead of the 90966?
I’m lost on this

You might want to check out the Medicare Claims Processing Manual, Chapter 8, Section 140.2. It provides scenarios for physician billing when caring for home dialysis patients, including patients who have been hospitalized during the month.

The Renal Physicians Association has billing and coding information that may be helpful too.