Medicare Part B (medical insurance) is part of Original Medicare and covers medical services and supplies that are medically necessary to treat your health condition.

This part of Medicare covers doctor visits, lab tests, diagnostic screenings, medical equipment, ambulance transportation, and other outpatient services.

Unlike Part A, Part B involves more costs, and you may want to defer signing up for it if you are still working and have insurance through your job or are covered by your spouse’s health plan. But if you don’t have other insurance and don’t sign up for Part B when you first enroll in Medicare, you’ll likely have to pay a higher monthly premium for as long as you’re in the program.

The federal government sets the Part B monthly premium, which is $170 in 2022. It may be higher if your income is more than $88,000.

You’ll also be subject to an annual deductible, set at $203 for 2022. And you’ll have to pay 20 percent of the bills for doctor visits and other outpatient services. If you are collecting Social Security, the monthly premium will be deducted from your monthly benefit.

Can I delay enrolling in Medicare Part B?
Some people may get Medicare Part A “premium-free,” but most people have to pay a monthly premium for Medicare Part B. Because Medicare Part B comes with a monthly premium, some people may choose not to sign up during their initial enrollment period if they are currently covered under an employer group plan (either their own or through their spouse’s employer).

If you are still working, you should check with your health benefits administrator to see how your insurance would work with Medicare.

If you delay enrollment in Medicare Part B because you already have current employer health coverage, you can sign up later during a Special Enrollment Period without paying a late penalty. You can enroll in Medicare Part B at any time that you are still covered by a group plan based on current employment. After your employer health coverage ends or your employment ends (whichever comes first), you have an eight-month special enrollment period to sign up for Part B without a late penalty.

Keep in mind that retiree coverage and COBRA are not considered health coverage based on current employment and would not qualify you for a special enrollment period. If you have COBRA after your employer coverage ends, you should not wait until your COBRA coverage ends to sign up for Medicare Part B. Your eight-month Part B special enrollment period begins immediately after your current employment or group plan ends (whichever comes first). This is regardless of whether you get COBRA.

What services are not covered by Part B?
There are some services that aren’t covered by Part B. If you need these services, you’ll need to pay for them out of pocket. Some examples of these include: