CALIFORNIA MEDICARE GUIDE
Still Working at 65? Medicare Questions to Verify Before You Delay Part B
Working past 65 can change Medicare timing. Use these questions with your employer, Social Security, and trusted counselors before deciding what to enroll in.
Working at 65 does not answer the enrollment question by itself
Working after 65 does not by itself establish whether you can delay Part B. Coverage through your own or your spouse’s current employment may allow a later Special Enrollment Period, depending on the circumstances. Verify your coverage with the benefits administrator and Social Security before making an enrollment decision.
COBRA and retiree coverage do not extend the usual eight-month Part B window after current employment or its qualifying coverage ends. Other coverage, including Marketplace and VA benefits, has different coordination and enrollment rules. Use Medicare’s enrollment guidance for your actual situation.
Ask your employer or union these questions in writing
Ask the benefits administrator whether your insurance is group health coverage based on your own or your spouse’s current employment. Ask which insurer pays first at 65. For non-tribal current-employment coverage, the usual rule is that Medicare pays first with an employer of fewer than 20 employees, while an employer plan pays first with 20 or more. Multi-employer arrangements and other exceptions can affect the answer, so obtain confirmation for your plan.
Request the employment end date and the date active group coverage will stop. Ask separately about continuation or retiree benefits and what happens to family members. Keep written coverage records; Social Security may ask for employment and insurance evidence when processing your Part B enrollment.
Check Part A and an HSA before enrolling
If you have a Health Savings Account, check contribution timing before applying for Medicare or Social Security benefits. Medicare enrollment stops HSA contribution eligibility, and a later Part A effective date can reach back into months when contributions were made.
Confirm the Medicare effective date with Social Security and review the contributions with an HSA administrator or qualified tax professional. The focused HSA guide linked below explains the dates and records to check.
Know the clock for a Special Enrollment Period
The current-employment Part B Special Enrollment Period generally ends eight months after the employment or qualifying group coverage ends, whichever happens first. COBRA does not restart that clock.
Confirm the employer coverage end date and requested Part B start date before other coverage ends. The focused Special Enrollment Period and COBRA guides linked below explain the timing, forms, and common gap risks. California HICAP also offers free, confidential Medicare counseling at 1-800-434-0222.
Three things to do next
- Ask your benefits office, in writing, whether your coverage is based on current employment.
- Ask when the active coverage ends and how it coordinates with Medicare.
- If you have an HSA, verify the timing with Social Security and a tax professional before enrolling.
Check the official sources
- Medicare: working past 65 (opens in a new tab)
- Medicare: coverage start dates and Special Enrollment Periods (opens in a new tab)
- Medicare: who pays first (opens in a new tab)
- IRS Publication 969: Medicare and HSA contributions (opens in a new tab)
- Social Security: sign up for Part B only (opens in a new tab)
- California HICAP counseling (opens in a new tab)
We prepare these explanations from the listed sources. This is general education, not a personalized recommendation. Confirm current rules and individual dates with the appropriate official source. Our editorial approach.