Guide 4: How Does Health Insurance Work?
Health insurance is a contract between you and an insurance company. You pay a monthly fee, called a premium and in return, the insurer helps cover your medical costs. What they cover, and how much, depends on your specific plan. Behind every visit is a system called Revenue Cycle Management (RCM) — the process that ensures your care is documented, billed, and paid correctly. When it works well, you get accurate bills and fewer surprises. BillCare works within this system on your behalf.
Key Cost Terminology:
Term | What It Means | Example |
|---|---|---|
Premium | Monthly fee to maintain coverage, whether or not you use it | $400/month |
Deductible | What you pay before insurance starts covering costs. You pay this every time you receive a medical service | First $1,500 of the year |
Copay | Fixed fee at time of visit or prescription | $25 per office visit |
Coinsurance | Your percentage share of costs after meeting your deductible | You pay 20%, insurer pays 80% |
Out-of-Pocket Maximum | The most you'll pay in a year (absolute limit)— after this, insurer covers 100% | $5,000/year cap |
How a Claim Works:
1. You receive care
Your provider documents the visit using medical codes — diagnosis (ICD-10-CM), procedures (CPT), and supplies (HCPCS). See Guide 2 for a full breakdown of these codes.
2. Your provider submits a claim
A coded, itemized claim goes directly to your insurer — this is separate from the bill you receive. It's a formal payment request submitted electronically.
3. Your insurer reviews the claim
Known as adjudication, this is where the insurer decides what's covered, what they'll pay, and what you owe. Coding errors or missing documentation at this stage can cause delays or denials.
4. You receive an Explanation of Benefits (EOB)
An EOB is not a bill — do not pay it.
It shows what was charged, what insurance paid, what you owe, and why anything was denied. Review it carefully before paying any provider bill. Discrepancies between your EOB and your bill are one of the most common sources of overcharges.
5. You receive a bill (if a balance remains)
Your provider bills you for whatever insurance didn't cover — this could be your copay, part of your deductible, coinsurance, or non-covered services.
Why Claims Get Denied:
Claims are denied more often than most patients realize — and not always correctly. Common reasons:
Reason | What It Means |
|---|---|
Coding error | A wrong or mismatched code triggers an automatic denial |
Missing documentation | Supporting records weren't included with the claim |
Out-of-network provider | Your provider isn't in your plan's network |
Prior authorization | The procedure needed advance approval from your insurer |
If your claim is denied, you have the right to appeal. BillCare can help you identify the reason and decide whether to dispute it.
Why RCM Matters to You
Every medical bill you receive is the end result of a multi-step process called Revenue Cycle Management. It covers everything from the moment you schedule an appointment to the final payment of your bill. When this process runs smoothly:
You receive accurate, timely bills
Your insurer receives the correct information to pay their share
Errors are caught before they reach you
When it breaks down — through coding errors, missing authorizations, or administrative mistakes — you can end up owing more than you should. This is exactly what BillCare monitors on your behalf. Guide 6 walks through each stage of this process in detail.
What You Should Do:
✓ Know your plan — Keep your Summary of Benefits accessible. Understand your deductible, copays, and out-of-pocket maximum before you need care.
✓ Read your EOB — Don't wait for the bill. Your EOB tells you what was covered and why anything was denied.
✓ Request an itemized bill — If anything looks off, a line-by-line breakdown is your starting point for disputing charges.
✓ Track your spending — Monitor what you've paid toward your deductible and out-of-pocket maximum. Your insurer's member portal usually tracks this automatically.
Legal Disclaimer: The information provided in this guide is for general educational purposes only and should not be considered as legal, financial, or medical advice. While we strive to keep information accurate and up to date, healthcare billing practices and regulations may vary by location and provider. Always consult with your healthcare provider, insurance company, or a qualified professional for specific guidance about your medical bills. BillCare is not responsible for any decisions made based on this information.