I am currently having this debate with a billing company about add-on code 88341.
The case is for Pathology, and the CPT codes are:
88305 x1
88342 x1
88341 x3
88360 x1

I am pointing out to them that modifier 59 should not be used on add on code 88341, And that it should be reported under 88360 instead but they disagree. 88360 is under the same family of 88342, but it specializes more for lymphoma, which makes it more expensive.

How can I prove this is true? they keep asking me for some type of evidence. i have already told them that my evidence is what i learned in school.

Thank you all for your attention.