Glossary
Special Enrollment Period (SEP)
An enrollment window triggered by qualifying life events — TRICARE does NOT trigger one.
What is it?
A Special Enrollment Period allows you to enroll in Medicare outside your IEP without penalty. It's granted for specific events like losing employer group health coverage based on current employment.
Why does it matter?
Many retirees wrongly assume TRICARE qualifies them for an SEP. It does not. Only active employer coverage (yours or your spouse's) qualifies. Skipping Part B because of TRICARE = permanent penalties.
When you'll encounter it
If you (or your spouse) work past 65 with employer health coverage and then retire, you get an 8-month SEP. Otherwise, you don't qualify.
Impact on Medicare
Lets you enroll without late penalties.
Impact on TRICARE For Life
Doesn't change how TFL works — but is the only legitimate way to delay Part B without losing TFL forever.
Common misconceptions
- "TRICARE counts as employer coverage." — It does not. CMS does not recognize TRICARE as creditable employer coverage for SEP purposes.
- "VA healthcare gives me an SEP." — It does not.
Related glossary terms
Related questions
Official sources
Last reviewed January 2026 against the 2026 Medicare & You and TRICARE For Life handbooks.