Here’s the simplest way to apply for Medicare in Illinois: sign up through Social Security online, by phone, or at a local Social Security office, and most people do it around their Initial Enrollment Period, which starts 3 months before the month they turn 65 and ends 3 months after it.

Apply this way

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Option How it works Helpful notes
Online Use your secure my Social Security account to apply for Medicare. This is described as the easiest and fastest way to sign up.
Phone Call Social Security at 1-800-772-1213. TTY users can call 1-800-325-0778.
In person Contact your local Social Security office to apply. Some Illinois guidance recommends making an appointment because walk-in wait times can be long.

What you need

You’ll usually need your Social Security number and other personal information when you apply online or in person. If you have not signed up for Social Security benefits before age 65, Illinois guidance suggests calling Social Security about six months before your 65th birthday to request a Medicare handbook and earnings/benefits estimate form.

Timing matters

If you miss your Initial Enrollment Period, you can face penalties or gaps in coverage. If you already receive Social Security retirement benefits before 65, you may be automatically enrolled in Medicare Part A and Part B when you turn 65.

Illinois help

Illinois residents can also get free Medicare counseling through SHIP, and the Illinois Department on Aging lists 1-800-252-8966 for Medicare-related help. If you are asking about state employee coverage, Illinois CMS says participants should contact Social Security and apply for Medicare when they turn 65.

Quick step list

  1. Check whether you are already being enrolled automatically.
  1. If not, apply online, by phone, or at a Social Security office.
  1. Gather your Social Security number and basic identity details first.
  1. Watch for your approval letter or welcome packet after SSA reviews your application.

TL;DR: In Illinois, you apply for Medicare through Social Security, usually online at the fastest route, by calling 1-800-772-1213, or by visiting a local office.