How do I get a prior authorization form from my Medicare Part D plan?
Medicare plan providers · updated Jun 26, 2025
For example, the insurance carrier and Medicare Part D plan provider Humana has an online Prior Authorization portal that can be found at: https://humana.promptpa.com/
You can also telephone your Medicare Part D prescription drug plan's Member Services department and ask them to mail you a Prior Authorization form. The toll-free telephone number for your plan's Member Services department is found on your Member ID card and most of your plan's printed information.
If you cannot find the telephone number, we have the telephone number for most Member Services departments online, just click on the plan’s name when using our Medicare Advantage Plan Finder or MA-Finder (enter your ZIP to begin) or our stand-alone Medicare Part D Plan Finder or PDP-Finder (choose your state to begin).
As a review, "Prior Authorization" is a form of utilization management (also known as drug restrictions or drug usage management restrictions) that your Medicare Part D plan may use in the plan's formulary to keep plan costs down and protect their plan members.
Utilization management restrictions can include such prescription controls as:
Quantity Limits (for example, only allowing plan members 30 tablets per 30 days) or
Prior Authorization (requiring members to get plan approval before filling a prescription) or
Step Therapy (having members try lower-costing medications before using a more expensive drug).
Reminder: Both our Formulary Browser (showing all drugs for a single Medicare plan) and our the drug finder® Drug Finder ( on this site - showing all Medicare plans covering a single drug) display the details of the drug utilization management requirements along with the drug cost-sharing information for all Medicare Part D plans and Medicare Advantage plans.