How do I know if my employer plan is creditable coverage?

Employer plans from companies with 20 or more employees typically qualify as creditable coverage for Medicare Part B. Your employer must provide annual notices about whether prescription drug coverage meets Part D creditable coverage standards.

Can I delay Medicare if I have COBRA coverage?

No, COBRA coverage does not qualify as creditable coverage for Medicare Part B. You should enroll in Medicare Part B when COBRA begins to avoid late enrollment penalties.

What happens if I lose creditable coverage?

Losing creditable coverage triggers a special enrollment period for Medicare. You have eight months after creditable coverage ends to enroll in Medicare Part B without penalty.

Does TRICARE count as creditable coverage for Medicare?

TRICARE typically qualifies as creditable coverage, but you should coordinate with TRICARE and Medicare at age 65. TRICARE becomes secondary to Medicare for most services once you are eligible for Medicare.

How long do late enrollment penalties last?

Medicare late enrollment penalties are permanent. Part B penalties continue for as long as you have Medicare coverage, and Part D penalties are added to your monthly premium for life.

What Is Creditable Coverage for Medicare?

Q: Does my marketplace health plan count as creditable coverage?

No, individual marketplace plans purchased through Healthcare.gov or state exchanges do not qualify as creditable coverage for Medicare purposes. You cannot delay Medicare enrollment based on marketplace coverage.

Key Takeaways

Creditable coverage is health insurance that meets or exceeds Medicare's minimum standards, allowing you to delay Medicare enrollment without facing late enrollment penalties.
Employer group health plans from companies with 20+ employees typically qualify as creditable coverage.
Individual marketplace plans, COBRA, and most private insurance do not count as creditable coverage for Medicare purposes.
Understanding creditable coverage rules helps you avoid permanent penalty fees when transitioning to Medicare.

Definition of Creditable Coverage for Medicare

Creditable coverage for Medicare refers to health insurance that is at least as good as Medicare's standard coverage and allows you to delay Medicare enrollment without penalty. This coverage must meet specific criteria established by the Centers for Medicare & Medicaid Services to protect beneficiaries from late enrollment penalties.

The creditable coverage determination differs for Medicare Part B (medical insurance) and Medicare Part D (prescription drug coverage). Each part has distinct requirements, and coverage that qualifies as creditable for one part may not qualify for the other part of Medicare.

Employer Group Health Plans as Creditable Coverage

Employer group health plans typically qualify as creditable coverage for Medicare Part B when the employer has 20 or more employees. These plans allow you to delay Medicare Part B enrollment while maintaining employer coverage without facing the 10% late enrollment penalty.

Group health plans from smaller employers (fewer than 20 employees) do not qualify as creditable coverage for Medicare Part B purposes. If you work for a small employer, Medicare becomes your primary insurance at age 65, and your employer plan becomes secondary coverage.

For Medicare Part D creditable coverage, employer prescription drug plans must provide coverage that is actuarially equivalent to standard Medicare Part D coverage. Your employer must notify you annually whether your prescription drug coverage meets creditable coverage standards.

COBRA and Retiree Health Plans

COBRA continuation coverage does not qualify as creditable coverage for Medicare Part B delays. When your COBRA coverage begins, you lose the creditable coverage status that your employer plan provided, and you should enroll in Medicare Part B during your special enrollment period. Learn more about the COBRA Medicare penalty trap →

Retiree health plans may or may not qualify as creditable coverage depending on their specific design and coverage levels. Your plan administrator must provide annual notices informing you whether your retiree coverage meets creditable coverage standards for Medicare Part D purposes. Read our guide on retiree coverage and Medicare →

Individual Market and Private Insurance

Individual marketplace plans purchased through Healthcare.gov or state exchanges do not qualify as creditable coverage for Medicare purposes. These plans cannot delay your Medicare enrollment without penalty, regardless of their comprehensiveness or cost.

Private health insurance purchased directly from insurance companies also does not meet creditable coverage standards for Medicare. This includes short-term health plans, association health plans, and ministry sharing plans that are not considered qualifying coverage for Medicare delay purposes.

Military and Government Health Coverage

TRICARE for Life requires enrollment in both Medicare Part A and Part B at age 65. Military retirees cannot delay Medicare Part B enrollment when TRICARE for Life becomes their coverage option. However, TRICARE rules require coordination with Medicare at age 65, and beneficiaries should carefully review their specific situation.

Federal Employee Health Benefits (FEHB) plans generally provide creditable coverage for Medicare Part D but have complex interaction rules with Medicare Part B. Federal retirees should coordinate with their benefits office to understand how their FEHB coverage works with Medicare.

Creditable Coverage Documentation

Your current insurance provider must provide documentation about creditable coverage status, typically in the form of annual notices or letters. These documents state whether your coverage meets creditable coverage standards and may be required when you enroll in Medicare.

Keep all creditable coverage documentation in case Medicare or insurance companies request proof of your prior coverage. This documentation protects you from late enrollment penalties and helps establish your special enrollment period rights when transitioning to Medicare.

Consequences of Non-Creditable Coverage

Having non-creditable coverage means you face late enrollment penalties if you delay Medicare past your Initial Enrollment Period. For Medicare Part B, the penalty is 10% of the premium for each 12-month period you were eligible but not enrolled, and this penalty continues permanently. Learn more about the Part B late enrollment penalty →

Medicare Part D late enrollment penalties equal 1% of the national base beneficiary premium for each month you were eligible for Part D but did not have creditable prescription drug coverage. In 2026, the national base beneficiary premium is $38.99, and this penalty amount is added to your monthly Part D premium for life.