How to Read Your Medical Bill and Spot Errors

Medical bills are notoriously confusing, and that's not an accident. Complex bills with cryptic codes make it harder for patients to identify errors. But studies suggest a significant percentage of medical bills contain mistakes, often in the hospital's favor.

Here's how to decode your bill and catch those errors.

Step 1: Request an Itemized Bill

The "summary" bill you receive isn't detailed enough. Call billing and request:

"I need a fully itemized statement showing all charges with CPT codes, quantities, and dates of service."

This detailed bill reveals individual charges that might be hidden in summary totals.

Step 2: Understand the Key Sections

Patient Information:

• Verify your name, date of birth, and insurance info are correct

• Errors here can cause claims to be rejected

Service Dates:

• Confirm the dates match when you actually received care

• Look for charges on days you weren't at the facility

CPT Codes:

• These 5-digit codes describe each service

• You can look up what each code means at aapc.com/codes

Charges:

• The "billed amount" is the list price (often inflated)

• "Allowed amount" is what insurance negotiated

• "Your responsibility" is what you actually owe

Step 3: Common Errors to Look For

Duplicate charges:

• Same service billed multiple times

• Same charge on multiple days

Incorrect quantities:

• More doses of medication than you received

• More supplies than were used

Upcoding:

• Being charged for a more expensive version of a procedure

• Example: Complex visit (99215) when you had a simple visit (99213)

Unbundling:

• Services that should be billed together being split into separate charges

• Often done to increase total billing

Operating room time:

• Verify OR time matches your actual surgery duration

• Common to be billed for longer than actual time

Canceled or refused services:

• Charges for tests you declined

• Charges for consultations that didn't happen

Step 4: Compare to Your EOB

Your Explanation of Benefits (EOB) from insurance shows:

• What the provider billed

• What insurance paid

• What you owe

Compare your EOB to your bill. They should match. Discrepancies indicate potential errors.

Step 5: Dispute Errors

If you find errors:

1. Document everything. Keep copies of all bills and communications

2. Call billing and explain the specific error

3. Request the error be corrected in writing

4. If not resolved, file a written dispute

5. Contact your insurance to report billing fraud if appropriate

6. File a complaint with your state's Attorney General if needed

Don't be intimidated. You have every right to a correct bill, and providers are legally required to fix errors.