Each Part D plan has a list of covered drugs called a formulary. If the drug you need is not on the formulary, you are allowed to request an exception, pay out of pocket, or file an appeal.


These formularies differ from plan to plan so be sure to request a copy. However, each plan must cover all drugs in the following categories:

• HIV/AIDS treatment
  
• Antidepressants
  
• Antipsychotic medications
  
• Anticonvulsive treatments for seizure disorders
  
• Immunosuppressants
  
• Anticancer drugs (unless they are being covered under Part B)
  

Most vaccines are also covered under Part D unless they are already covered under Part B.