-RT modifier?
Yeah, it seems to me that insurance will deny if 31624 is reported twice. My gut says they would wonder why the doctor did this twice, and it seems they would request supporting documentation. Reading this again, I don't think modifier -51 would apply here. I do agree with you. Would go with: 31624 and 31623. Do you think modifier -RT would be appropriate here because of the specificity of the right lobes? 31624-RT, 31623-RT?