How to read an itemised hospital bill

Ask for it first

What arrives in the post is usually a one-line summary: a total, a due date, and very little else. You cannot verify anything from it. The itemised bill lists every charge individually with its billing code, and you are entitled to ask for it.

Ring or email the billing department and ask for "a fully itemised bill including billing codes". Do it in writing where you can — it creates a record of the date, which matters if the account later moves toward collections.

This is step one for a reason. Checking the bill costs nothing, sometimes reduces it on the spot, and does not affect your ability to apply for financial assistance afterwards.

The three documents, and how they differ

• The summary statement — what the hospital sends by default. A total and a due date.
• The itemised bill — every line, every code, every quantity. What you actually want.
• The explanation of benefits (EOB) — sent by your insurer, not the hospital. It shows what was billed, what the insurer allowed, what it paid, and what it says you owe.

Read the itemised bill against the EOB. If the hospital is asking for more than the EOB says is your responsibility, that discrepancy is your first question and it is a common one.

What to check, in order

1. Are the basics right?

Your name, date of birth, the dates of service, and the insurance details. A digit wrong in a policy number causes a denial that looks like a bill. This accounts for a surprising share of "you owe us" letters.

2. Duplicate charges

The same code appearing twice on the same date. It happens through re-submission and through two departments recording the same item. Scan the codes for repeats.

3. Quantities

Look at units. A medication billed at ten doses when you received two, or an hour of a service that took fifteen minutes. Quantity errors are easy to spot once the itemised list is in front of you and impossible to spot before.

4. Services you did not receive

Tests that were ordered then cancelled, a specialist who never appeared, a room charge for a night you were discharged. Match the list against your own memory of the stay, and against discharge paperwork if you kept it.

5. Room and board versus supplies

A daily room charge normally includes routine nursing care and standard supplies. Basic items billed separately on top — the classic example being ordinary consumables at extraordinary prices — are worth questioning.

6. Unbundling

Some procedures are meant to be billed as a single bundled code. Charging separately for each component produces a higher total. If a single procedure appears as a cluster of related line items, ask whether it should have been billed as one.

7. Upcoding

A code describing a more complex or lengthy service than the one delivered — a brief consultation coded as an extended one. Hard to spot without knowing the code sets, but the description usually gives it away when the level of service does not match your recollection.

How to query it

Put questions in a single written list rather than a phone call. Be specific: line number, date, code, and what you believe is wrong. Ask for a written response.

A reasonable opening: "Please review lines 14 and 15, both coded [code] on [date]. I received this service once. Please confirm whether one is a duplicate and issue a corrected statement."

Keep the tone factual. The person reading it did not create the error and has more discretion to fix it than you might assume.

What this is not

Checking a bill for errors is not the same as disputing care, and it is not an accusation. Hospital billing runs at enormous volume through several systems, and mistakes are routine rather than sinister. Most corrections are made without argument once identified.

Then move to the next step

Once the bill is accurate, the question becomes what you owe rather than what you were charged. That is where financial assistance and the No Surprises Act come in — and both should be settled before you discuss paying a reduced amount.