Are Humana Part D plans available to everyone?

Part D plans are Medicare prescription drug coverage, and Medicare is only available to those age 65 and older or who are under 65 and have a disability, according to Medicare.gov. Those who qualify are only able to enroll during specific times of year.

Enrollment in Humana Part D provides standalone prescription drug coverage and requires participants to continue paying premiums under Medicare Part B, states Humana. Various plans are available with distinct copay amounts and covered drugs. Benefits, restrictions and premium amounts change each year, and enrollment in the Humana Part D plan depends on Humana's contract renewal with Medicare as a Medicare Advantage provider.