I have a question about administering a chemotherapy drug and immunotherapy drug such as Avastin at the same encounter. For example, we charge a chemo drug with the admin of 96413. Then, we charge Avastin or Zometa with 96365. The 96365 denies as bundled. Is it correct to add a 59 modifier since the Avastin or Zometa is in a different class of medication from the Chemo drug?