Vedanth Bhartee
Writer · Reviewed by Richard ChanUpdated Jun 12, 2026
3 min read
If you enroll in a Medicare Supplement (Medigap) policy during your open enrollment period, the insurance company cannot impose a waiting period for pre-existing conditions.
Outside of the initial Medigap Open Enrollment Period, insurers may implement up to a six-month waiting period for pre-existing conditions if you did not have creditable coverage.
Medicare Part A, Part B, and Medicare Advantage plans do not impose waiting periods for pre-existing conditions.
A pre-existing condition waiting period refers to a specific period during which an individual who enrolls in a health insurance plan may experience a delay in coverage for certain pre-existing medical conditions. This waiting period is commonly applied by some health insurance plans, especially those offered by employers, to manage the costs associated with providing coverage for individuals with existing health conditions. Understanding how pre-existing condition waiting periods work and their impact on healthcare coverage is crucial for individuals navigating health insurance options. In this article, we explore the concept of pre-existing condition waiting periods and how they may affect insurance benefits for individuals with specific health conditions.
A pre-existing condition waiting period is a timeframe during which an individual who has a pre-existing medical condition must wait before their health insurance plan covers treatment or services related to that condition. This waiting period typically begins on the effective date of the health insurance coverage and can vary in duration depending on the specific plan’s policies.
Pre-existing condition waiting periods are commonly applied in certain health insurance plans, such as employer-sponsored group plans. Not all health insurance plans utilize pre-existing condition waiting periods, and they are subject to state and federal regulations. It is essential for individuals to carefully review the terms and conditions of their health insurance plans to determine if a waiting period applies to their specific situation.
During the pre-existing condition waiting period, the health insurance plan may not cover medical services, treatments, or prescriptions related to the pre-existing condition. However, coverage will typically be provided for other non-pre-existing medical needs. Once the waiting period has expired, the plan should begin covering services related to the pre-existing condition as well.
Medicare Supplement plans are designed to work alongside Original Medicare (Part A and Part B) to help cover certain out-of-pocket costs such as copayments, coinsurance, and deductibles. However, unlike Original Medicare, which generally covers pre-existing conditions from the start, Medicare Supplement plans might have certain limitations related to pre-existing conditions, depending on when you enroll.Here are some important points to consider:
It’s important to note that rules and regulations related to Medicare and Medicare Supplement plans can vary by location and might change over time. It’s recommended to research and consult with a licensed insurance agent or a Medicare expert before making decisions about your coverage to ensure that you understand the options available to you based on your specific situation.