How to enroll

When to enroll 

You can purchase a HAP Alliance Medicare Supplement plan at any time. The best time to purchase your policy is when you become eligible for Medicare and enroll in Medicare Part B. 

Ways to enroll 

Phone 

Call a licensed HAP sales representative at (888) 447-3850 (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 sales representative will return your phone call the next business day. Please do not share personal health information when you leave your message.

There are several convenient ways to enroll in a HAP Medicare Supplement Plan. 

Online

• Enroll

Mail

Complete and mail your enrollment form to: 

HAP Medicare Sales Division
1414 E Maple Rd.
Troy, MI 48083

Forms

• 2025 Medicare Supplement Enrollment Form 2025 Medicare Supplement Enrollment Form
• 2026 Medicare Supplement Enrollment Form 2026 Medicare Supplement Enrollment Form
• Medicare Supplement Attestation Form