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Schedule a virtual appointment with a HAP Medicare Expert

Have questions about Medicare?

Five easy ways to enroll

Connect over the phone

Speak with a licensed HAP Medicare sales representative. Call (800) 868-9885 (TTY: 711).

Office hours: 
8 a.m. to 8 p.m., seven days a Week (Oct. 1 – March 31)
8 a.m. to 8 p.m., Monday through Friday (April 1 - Sept. 30)

At all other times, you may access our interactive voice recording system at the same number and leave your name and phone number. A HAP Medicare sales representative will return your phone call the next business day. Please do not share personal health information when you leave your message.

Attend an in-person seminar or webinar

Come to a free HAP Medicare in-person seminar or webinar, where a licensed Medicare expert will present plan information, answer questions or help you enroll.

Mail your application 

Complete and mail your enrollment form to: 

Health Alliance Plan
1414 E Maple Rd
Troy, MI 48083

Choose the form that corresponds with your Medicare plan:


Medicare beneficiaries may also enroll in a HAP Medicare Advantage plan through the CMS Medicare Online Enrollment Center located at

When to enroll

If you’re newly eligible for Medicare, you can sign up for a plan during your initial enrollment period. Examples include:

  • Turning 65. You can apply up to three months before your birthday month, during your birthday month or within the three months following your birthday month. Learn more about what to do when you're turning 65.
  • A disability that qualifies you for Medicare.

Annual Enrollment Period 

Each year, you can explore your Medicare Advantage options during the Annual Enrollment Period which happens from Oct. 15 to Dec. 7.

Medicare Advantage Open Enrollment Period 

Between Jan. 1 and Mar. 31, you can make one change if you have a Medicare Advantage Plan during the Medicare Advantage Open Enrollment Period. This includes switching from one Medicare Advantage Plan to another, or dropping your Medicare Advantage Plan and returning to Original Medicare. 

Special Enrollment Period

There are specific events that could qualify you for a special enrollment period, including loss of union-paid or employer-paid coverage or moving out of your current plan’s service area.

This special enrollment period has rules about when you can make changes and the type of changes you can make. If you believe you may qualify for a special enrollment period, you can find out more at for specific rules.

Transition process for Medicare Part D

Medicare enrollees have a transition period to give them sufficient time to work with their doctors to ensure their drug therapies are included in our list of covered drugs, also known as a formulary. The transition period also allows time to select an alternative drug therapy or to request an exception based on medical necessity.

Enroll online 

You can use our shopping tool to compare plans. 

Health Alliance Plan (HAP) has HMO, HMO-POS, PPO plans with Medicare contracts. HAP Medicare Complete Duals (HMO D-SNP) is a Medicare health plan with a Medicare contract and a contract with the Michigan Medicaid Program. Enrollment depends on contract renewals.