Pre-Existing Condition Denial

What Strengthens Your Appeal

• ✓Proof that your plan is ACA-compliant (most employer, marketplace, and Medicaid plans are — pre-existing conditions cannot be excluded)
• ✓Documentation of your continuous coverage if using a short-term or transitional plan
• ✓Medical records showing the condition was NOT diagnosed or treated in the relevant lookback period
• ✓Evidence that the insurer's determination of 'pre-existing' was made without adequate medical review
• ✓Proof that the treatment relates to a new or worsened condition, not the pre-existing one

Appeal Packet: What to Include

• 1Denial letter with the specific exclusion provision cited
• 2Your policy documents showing whether a pre-existing condition exclusion applies
• 3Proof of ACA-compliant coverage (if applicable, the insurer cannot use this exclusion)
• 4Your prior insurance coverage documentation (creditable coverage letters)
• 5Medical records showing timeline of diagnosis and treatment
• 6Physician letter addressing the timeline and clinical history

What to Ask Your Doctor or Provider

Your provider plays a key role in your appeal. Ask them for:

• →A letter clarifying when the condition was first diagnosed and first treated
• →Clinical documentation showing the history of your condition and when it became relevant to the current claim
• →Confirmation of continuous coverage history if applicable

Step-by-Step Escalation

If your first appeal fails: File a complaint with your state insurance department — pre-existing condition violations under the ACA are strictly regulated. For marketplace or employer plans, also file with CMS or the Department of Labor.

Procedure-Specific Pre-Existing Condition Guides

Related Denial Reasons