You cannot go directly to the enrollment sections of Humana's website (www.humana-medicare.com).
You access Humana's online enrollment module through the plan comparison tool.
To begin, enter your ZIP Code and then press the "Compare" button.
If you selected "Compare Prescription Drug Plans", your compare plans screen will be a bit less cluttered. From this screen you can click on the enroll button next to your selected plan.
This screen allows you to verify that you have selected the correct plan and then decide if you are an existing member wanting to change plans or new to Humana. Entering a "new" enrollment although you are an existing member, will not adversely effect your membership.