How to read your hospital bill (and spot the errors most people miss)

Hospital bills are confusing on purpose. That sounds cynical, but the format wasn't built for patients. It was built for insurers, auditors, and billing departments. The codes and abbreviations assume you already know what you're looking at. Most people don't, and that's exactly where money leaks out.

Here's how to read the document, and the five errors worth checking for before you pay a cent.

Summary bill vs. itemized bill

Most hospitals send a summary billfirst: a total, a few grouped charges, a due date. It's not the document you need.

What you want is the itemized bill: every procedure, medication, and supply on its own line, each with a code. Federal law gives you the right to one at no charge. Call billing and say: “I'd like an itemized statement with CPT codes and individual charges for each service.” They generally must provide it.

What CPT codes are

CPT (Current Procedural Terminology) codes are five-digit codes for every billable procedure. A moderate office visit is 99214. A two-view chest X-ray is 71046. A blood draw is 36415. These codes are how you compare what you were charged to what Medicare pays for the exact same service, and Medicare rates are public.

The five errors that show up again and again

1. Duplicate charges

The same code appears twice for the same date of service. It happens most when a bill passes through several departments. Scan for a repeated CPT code on the same day.

2. Upcoding

Billing a more expensive version of what you got. A routine 15-minute visit (99213) billed as a complex 40-minute one (99215) is the classic example. If the visit was straightforward, question the level.

3. Unbundling

Some procedures are supposed to be billed together under one lower “bundled” code. Billing each piece separately, like every test in a metabolic panel instead of the panel code (80053), inflates the total.

4. Phantom charges

Charges for things you never received. Two days admitted but billed for three? One IV but charged for two? Line items you don't recognize are worth challenging.

5. Pharmacy markups

Hospitals routinely mark up medications many times over. A five-cent acetaminophen tablet can appear as $15. Extreme markups on common drugs are fair game in a dispute.

Comparing a charge to the Medicare rate

Medicare publishes what it pays for every code in the Physician Fee Schedule. Hospitals aren't required to charge those rates to self-pay patients, but a charge that's 5× or 10× the Medicare rate is a strong, specific place to start a dispute. Find the CPT code on your itemized bill and compare the non-facility or facility price at cms.gov.