This content is for general informational purposes and does not constitute medical, legal, or financial advice. Healthcare rules and costs change annually. Last reviewed: January 1, 2025. Always verify current details with your insurer, employer, or a licensed healthcare navigator.
Pre-Existing Condition
A health condition you had before your insurance coverage started.
Full Definition
A pre-existing condition is any health condition — chronic illness, injury history, or medical diagnosis — that existed before your health insurance coverage began. Before the ACA, insurers could deny coverage, charge higher premiums, or exclude treatment for pre-existing conditions. Under the ACA (effective 2014), insurers offering individual and small-group plans cannot deny coverage, charge more, or impose waiting periods based on pre-existing conditions. Short-term health plans and some grandfathered plans are exempt from this protection.
Real-World Example
You were diagnosed with Type 2 diabetes in 2020. Under the ACA, when you apply for a new marketplace plan, the insurer cannot deny your application or charge you more because of your diabetes.
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