Search a CPT Code
Start with one code from your bill. We will explain what it usually means.
Common Billing Questions
Office Visits
Why did your doctor charge for a Level 4 visit?
Lab Tests
What are all these separate charges for blood work?
Emergency Room
Understanding ER levels and facility fees.
Imaging
X-Rays, MRIs, and CT Scans explained.
Insurance EOB & Denial Codes
Don't let confusing insurance adjustment reason codes trick you into paying bills you don't owe.
CO-45 Denial Code Explained
Did your EOB show a large dollar amount under code CO-45? Learn why this is a contractual write-off, why in-network doctors cannot bill you for it, and how to verify your real patient responsibility.
Read CO-45 Guide →How to Read an EOB Statement
A complete 10-step walkthrough of your Explanation of Benefits. Understand the difference between billed charges, allowed amounts, copays, coinsurance, and deductibles.
Read 10-Step Guide →Think You Were Overcharged?
Learn how to spot errors and ask the right questions.
Read the Dispute Guide