NEVER PROCESS PMB CLAIM RIGHT

My mom is on warfarin. She has a treatment plan, she needs to have her levels checked all the time to ensure she takes the right dosage. It is PMB I48.0 every time Pathcare submits the claim for the same tariff codes 3605 AND 3606 i have to call Bonitas Boncap to process the claim correctly.Why do I need to do the scheme work for them. Then they tell me that the Pathcare does not use the correct code? Pathcare sends me the same account and i can clearly see I48.0 so please CAN SOMEONE who works in the claims department not load a filter this is going on for 1 year already back and forth demanding letters from pathcare that Bonitas don't pay . I need a solution I am not employed at Bonitas to do admin work.