What an itemized bill contains
Each line item on an itemized bill typically includes a revenue code (a four-digit code used by hospitals), a procedure or CPT code, a description of the service, the date of service, the quantity, and the charge. For inpatient stays, you will also see daily room-and-board charges, nursing care charges, and separate charges for each medication administered.
A single emergency department visit can produce 40 to 100 line items. A surgical inpatient stay can produce 200 or more. That volume is exactly why errors slip through: no one is expected to review them, so no one does.
How an itemized bill differs from a summary bill
A summary bill groups charges into broad categories like "pharmacy," "laboratory," and "room and board." It gives you a total but hides the individual components. Hospitals typically mail summary bills by default because they are simpler and draw less scrutiny.
An itemized bill breaks every charge out individually. It is the document auditors, insurers, and billing advocates use to verify that what was billed matches what was actually provided. You are entitled to it upon request at no charge in most states.
Your right to an itemized bill
Federal law does not explicitly require hospitals to provide itemized bills, but Medicare Conditions of Participation (42 CFR Part 482) require hospitals to have a process for resolving billing disputes, which implicitly requires access to itemized records. More than 30 states have laws that explicitly require hospitals to provide itemized bills upon patient request.
In practice, virtually every hospital will provide one if you ask. If a hospital refuses, cite your state law and file a complaint with the state health department. For Medicare patients, contact your Medicare Administrative Contractor.
How to read an itemized bill
Start with the header: confirm the patient name, admission and discharge dates, and attending physician are correct. Then scan for the date column. Any charge with a date outside your admission window is immediately suspicious.
Look up unfamiliar codes. Revenue codes starting with "0" are facility fees. CPT codes in the 99200-99499 range are evaluation and management visits. CPT codes in the 10000-69999 range are surgical procedures. The CMS physician fee schedule search tool at cms.gov lets you look up any CPT code and see what Medicare pays for it as a reference point.
What to do after reviewing your itemized bill
Mark every line you cannot verify or do not recognize. Then request your medical records from the same stay and cross-reference. If a charge appears on the bill but not in the medical records, it should not be there.
Compare the itemized bill against your Explanation of Benefits from your insurer. The EOB shows what your insurer was billed for each service. Discrepancies between the two documents are a strong indicator of a billing error.
Frequently asked questions
Is an itemized bill the same as a UB-04?
The UB-04 is the standardized claim form hospitals use to submit bills to insurers. It contains much of the same information as an itemized bill but is formatted for payer processing. Patients can request a copy of the UB-04, but the itemized patient bill is often more readable.
How do I request an itemized bill?
Call the hospital billing department and ask for your "itemized statement" or "itemized bill." Give them your account number from any bill you have received. Follow up in writing if you do not receive it within 5 to 7 business days.
Can I request an itemized bill for outpatient or clinic visits?
Yes. Itemized bills are available for any healthcare encounter: inpatient, outpatient, emergency, or clinic. The format varies, but all providers bill using standard codes that can be reviewed the same way.
What if the itemized bill contains codes I cannot identify?
Use the CMS fee schedule at cms.gov/medicare/physician-fee-schedule/search to look up any CPT code. For supply or revenue codes, the hospital billing department is required to explain each charge upon request.