What Is Explanation of Payment
An Explanation of Payment (EOP) is a document your insurance company sends to you as a patient detailing how they processed your medical claim, what they paid, what they denied, and why. It shows the breakdown between what the provider charged, what your plan allows, what insurance paid, and what you owe. Unlike an ERA, which goes to the provider, an EOP goes directly to you and uses consumer-friendly language.
Why It Matters
The EOP is your primary tool for understanding a claim denial or underpayment. Insurance companies often bury the reason for denial in dense coded language, but the EOP must explain it clearly enough that you can challenge it. In many states, the EOP is a legally required document. Under the Affordable Care Act and state insurance regulations, insurers must send you an EOP within 30 days of processing a claim. If you're fighting a denied claim, the EOP is your first piece of evidence. It shows exactly where the insurer made their decision and gives you grounds to file an internal appeal or, if needed, an external appeal through your state's insurance commissioner's office.
How It Works
- Timeline: You receive the EOP after the provider submits the claim, typically within 30 days. Some insurers send it electronically; others mail it.
- Content structure: The EOP lists the provider's billed amount, the plan's allowed amount (what the insurer negotiated), your copay or coinsurance, insurance's payment, and your remaining balance.
- Denial codes: If a claim is denied, the EOP includes a specific reason code. "Not medically necessary" requires different evidence to appeal than "not a covered service."
- Appeal deadline: Most states require the EOP to include your deadline for filing an internal appeal, typically 180 to 365 days from the denial date.
- Difference from ERA: The Remittance Advice or ERA is the same information sent to the provider for their billing records. You need both documents to fully understand what happened.
Reading Your EOP for Appeals
When you receive an EOP with a denial, look for three things. First, the denial reason code and explanation. If it says "not medically necessary," you'll need clinical evidence, prior authorization records, or doctor's letters to overturn it. If it says "prior authorization required," that's different: you may have a strong case if your doctor should have requested pre-approval but didn't. Second, check the allowed amount. Sometimes insurers deny because they claim the provider is out-of-network or the facility doesn't meet their standards. Third, verify the service dates and procedure codes match your actual treatment. Insurers occasionally deny the wrong claim by accident.
Common Questions
- Can I appeal if the EOP says "not medically necessary"? Yes. You can file an internal appeal with your insurer within the deadline shown on the EOP, usually including a letter from your doctor explaining why the treatment was medically necessary. If the insurer denies again, you can file an external appeal with your state's insurance department, which is free and independent.
- What if I never received an EOP? Contact your insurance company's customer service line. Most insurers are required by law to send you one. Request a copy in writing. If they can't produce one after 10 business days, document this, as it may support your appeal claim that the insurer failed to follow proper procedures.
- Does the EOP affect my credit if I owe money? No, but the provider's bill can. If you don't pay the remaining balance you owe, the provider may send it to collections. If the claim is under appeal, ask the provider to hold the bill during your appeal period. Many will, especially if you have documentation from your insurer showing an open appeal.