What Is a Health Insurance Claim?

By the Florida Plan Finder Team | Licensed Florida Health Insurance Agency | (877) 224-8539 | Last Updated: April 8, 2026

Key Takeaways

A health insurance claim is a request for payment submitted to your insurer after you receive a medical service.
In-network providers file claims on your behalf — you typically don't need to do anything.
Your insurer sends an Explanation of Benefits (EOB) after processing each claim, showing what was covered and what you owe.
If a claim is denied, you have the right to appeal — first internally, then through an independent external review.
The No Surprises Act protects Florida patients from surprise bills for emergency services and certain out-of-network care at in-network facilities.

Every time you receive a medical service covered by your health insurance plan, a claim is generated. A health insurance claim is the mechanism by which your provider gets paid and your cost-sharing (deductible, copay, coinsurance) is calculated. Most of the time, this process happens behind the scenes. But when something goes wrong — a claim is denied, a bill seems too high, or you receive a surprise charge — understanding the claims process gives you the knowledge to respond effectively.

How the Claims Process Works

The health insurance claims process follows a standard sequence, whether you are seeing a primary care doctor, visiting the emergency room, or having surgery:

Step 1: You receive a covered medical service. You visit a doctor, get lab work, fill a prescription, or receive hospital care.
Step 2: The provider submits a claim. The provider (or their billing department) creates a claim using standardized medical billing codes (CPT codes for services, ICD-10 codes for diagnoses) and submits it electronically to your insurance company.
Step 3: The insurer processes the claim. The insurer verifies your coverage, confirms the service is covered under your plan, applies the in-network negotiated rate (the "allowed amount"), and calculates your cost-sharing based on your deductible status, copay, or coinsurance.
Step 4: The insurer pays the provider. The insurer sends payment for its share directly to the in-network provider.
Step 5: You receive an EOB. The insurer sends you an Explanation of Benefits — a statement (not a bill) that itemizes the service, what was billed, what the allowed amount was, what the insurer paid, and what you owe.
Step 6: You receive a bill from the provider. The provider bills you for your remaining cost-sharing amount — the portion the insurer did not pay (your deductible, copay, or coinsurance).

Understanding Your Explanation of Benefits (EOB)

The EOB is a critical document that many people throw away or ignore. It is not a bill — it is an accounting of how your claim was processed. Every EOB includes:

Provider and service description — who provided the care and what was done
Billed amount — what the provider originally charged
Allowed amount — the negotiated rate between your insurer and the in-network provider (this is always lower than the billed amount)
Insurance paid — what your insurer actually paid the provider
Your responsibility — what you owe (broken down by deductible, copay, and/or coinsurance)

Always compare your EOB to any bill you receive from the provider. If the bill amount doesn't match the "your responsibility" amount on the EOB, contact both the provider and your insurer to resolve the discrepancy before paying.

Who Files the Claim?

In-network providers file claims directly with your insurer. This is one of the key benefits of staying in-network — the administrative burden is on the provider, not you. You typically just show your insurance card at the visit and the rest is handled behind the scenes.

Out-of-network providers may or may not file claims with your insurer. In many cases, you pay the provider the full amount at the time of service and then submit a claim to your insurer yourself for reimbursement (if your plan covers out-of-network care). You will need to provide an itemized bill, the provider's tax ID, and any relevant medical records.

Common Reasons Claims Are Denied

Claim denials are not uncommon. According to KFF research, approximately 17% of in-network claims on ACA marketplace plans are denied. Common reasons include:

Coding errors — incorrect CPT or ICD-10 codes submitted by the provider's billing department
Lack of prior authorization — the service required advance approval that wasn't obtained
Service not covered — the specific service is excluded from your plan's covered benefits
Out-of-network provider — the provider is not in your plan's network (relevant for HMO/EPO plans)
Not medically necessary — the insurer determines the service was not required based on clinical guidelines
Duplicate claim — the same service was billed more than once
Timely filing limit exceeded — the provider submitted the claim after the insurer's deadline (typically 90–365 days from the date of service)

How to Appeal a Denied Claim

Under the ACA, you have the right to appeal any claim denial. The appeals process has two levels:

Internal appeal: You submit a written appeal to your insurer within 180 days of the denial. Include a letter explaining why the service should be covered, any supporting medical records, and a letter from your doctor if applicable. The insurer must review the appeal using a different reviewer than the one who made the original denial decision. For urgent claims, insurers must complete the internal appeal within 72 hours.

External review: If the internal appeal is denied, you can request an independent external review. An independent third-party organization — not your insurer — reviews the case and makes a binding decision. This is a powerful consumer protection under the ACA.

Florida Office of Insurance Regulation (OIR) Florida residents can also file a complaint with the Florida Office of Insurance Regulation if they believe a claim was improperly denied. OIR can investigate and intervene on your behalf. This is a separate process from the ACA appeal process and can be pursued simultaneously.

The No Surprises Act and Balance Billing Protections

The federal No Surprises Act, in effect since January 2022, protects Florida patients from surprise medical bills in specific situations:

Emergency services: You cannot be balance-billed for emergency care, regardless of whether the provider or facility is in-network. You pay your in-network cost-sharing rate.
Out-of-network providers at in-network facilities: If you receive care at an in-network hospital but are treated by an out-of-network provider (anesthesiologist, radiologist, pathologist), you are protected from balance billing. You pay your in-network rate.
Air ambulance services: Out-of-network air ambulance providers cannot balance bill you beyond your in-network cost-sharing amount.

These protections apply automatically — you do not need to do anything to activate them. If you receive a balance bill that you believe is covered by the No Surprises Act, contact your insurer and reference the federal protection.

Frequently Asked Questions

What is a health insurance claim?

A health insurance claim is a formal request submitted to your insurance company for payment of a covered medical service. When you see an in-network provider, the provider files the claim on your behalf. The insurer reviews the claim, determines how much is covered, and sends you an Explanation of Benefits (EOB) showing what was paid and what you owe.

Who files a health insurance claim?

For in-network services, the provider files the claim directly with your insurer — you generally don't need to do anything. For out-of-network services, you may need to pay the provider upfront and then submit a claim to your insurer yourself for reimbursement, along with an itemized bill and any required documentation.

What should I do if my health insurance claim is denied?

First, review the denial reason on your EOB or denial letter. Common reasons include coding errors, missing prior authorization, or the service being deemed not medically necessary. You have the right to appeal any denial. Under the ACA, insurers must provide an internal appeal process and, if that fails, an external review by an independent third party.

What is an Explanation of Benefits (EOB)?

An EOB is a statement your insurer sends after processing a claim. It is not a bill. It shows the service provided, the provider's billed amount, the insurer's allowed amount, what the insurer paid, and what you owe (deductible, copay, or coinsurance). Compare your EOB to any bills you receive from the provider to ensure accuracy.

Navigating claim denials and appeals can be confusing. A licensed Florida health insurance agent can help you understand your coverage and advocate for your claims.

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