Upcoding on a Medical Bill: What It Is, How to Spot It, and What to Ask For

Upcoding is when a medical bill carries a billing code for a more complex, and more expensive, service than the one you actually received. The most common pattern is a visit billed at a higher level than the record supports, such as an emergency room visit coded 99285 when the care matched a 99283. You cannot see it on a summary bill. You need the itemized bill, and then you ask the provider in writing to show the documentation that supports the level it billed.

Every service on a medical bill has a code. The code is what the hospital or doctor's office sends to your insurance company, and the code sets the price. Upcoding is when the code on the bill is for a bigger, more complex, more expensive service than the one you got.

You cannot catch it by reading a total. You catch it by reading the codes. This page shows you how.

What are the codes on a medical bill?

Two code sets cover almost everything. Federal rules make them the standard for billing (45 C.F.R. § 162.1002).

• CPT® codes are five digits, like 99283 or 71046. The American Medical Association maintains them. They describe what a doctor or clinic did: a visit, a test, a procedure.
• HCPCS Level II codes are a letter and four digits, like A0427. The federal Centers for Medicare & Medicaid Services (CMS) maintains them. They cover supplies, equipment, and services such as ambulance rides.

A summary bill hides the codes behind words like "emergency services." An itemized bill shows every charge on its own line, with its code. That is the document you need. How to request an itemized bill.

What does upcoding look like?

The most common pattern is a level-of-service code. Many visits are billed on a ladder of five codes. Each step up means the visit was more complex, and each step up costs more.

Emergency room visits use CPT codes 99281 through 99285. Under the AMA's CPT guidelines, 99283 is a visit with a "low level of medical decision making," and 99285 is a visit with a "high level of medical decision making." Time is not a factor for emergency room codes. What matters is how complex the problem was, how much the staff had to review, and how risky the decisions were.

So a visit where you had one X-ray, got a brace, and went home is on the low end of the ladder. A visit with several tests, a specialist consult, and a decision about whether to admit you is on the high end. Office visits and hospital stays have ladders of their own.

Other patterns include:

• A procedure code for a bigger procedure than the one in your record. For example, a code for a complex wound repair when the note describes a simple one.
• A higher ambulance level. Advanced life support (code A0427) pays more than basic life support (code A0429). The crew's patient care report has to show that advanced care was given. Ground ambulance bills explains this one.

An example, not a real bill: you went to the emergency room with a sprained ankle, had one X-ray, and left in two hours. The itemized bill shows 99285. That line may need more proof.

Why "may need more proof" and not "wrong"?

A high-level code is not an error by itself. Someone who arrives with chest pain and gets a full workup is correctly billed at a high level. The code is only wrong if the record does not support it.

That is why the question you ask is not "why is this so much" but "show me the documentation that supports this level." The provider's own notes decide it. You are asking them to show their work.

How do I spot it on my bill?

1. Get the itemized bill. Ask in writing. BillFighter's Request Itemized Bill letter asks for every charge on its own line with its code. How to request an itemized bill.
2. Find the visit code. Look for a five-digit code starting with 99. Write it down.
3. Compare it to what happened. How long were you seen? What tests were run? Was anything decided that carried real risk? A short, simple visit with a 99284 or 99285 is a line worth questioning.
4. Check the other lines. Does each procedure code match what you remember? Does the quantity match? Common medical bill errors.
5. Compare with your EOB. The Explanation of Benefits from your insurance company shows what the plan paid for each code and what your share is. If the codes on the bill do not match the EOB, that is a second thing to ask about. How to read your EOB.

What do I ask the provider for?

Ask in writing. A letter has a date on it, and a copy stays in your folder. The letter should:

• Name the account number, the date of service, and the line you are questioning, with its code
• Ask for the visit note or medical record that supports the level billed. You have a right to a copy of your own record (45 C.F.R. § 164.524), and the provider must act on the request within 30 days (they may take one 30-day extension if they tell you in writing)
• Ask for a corrected bill if the record does not support the code
• Ask that the account be held out of collections, with no late fees or interest, while they review
• Ask for the answer in writing

BillFighter's Dispute Letter names the line, the code, and the date, and asks for exactly this. If all you have is a total, the Request Itemized Bill letter comes first. Read a made-up example: Medical bill dispute letter sample.

Do not put your own price on the service. The letter asks for proof. It does not say what the charge should be.

When does it become an insurer question?

If insurance paid part of the bill, the insurer paid on that code too, and your share was set by it. Two things follow:

• Ask the plan to review the claim. Call the number on your insurance card, say which code you are questioning, and ask them to put their answer in writing.
• If the plan says no, or you disagree, BillFighter's Insurance Appeal letter asks the plan to take a second look at the claim.

If you have Medicare, the itemized statement is yours by right within 30 days of a written request (42 U.S.C. § 1395b-7(b)), and the same letter asks for it.

What BillFighter does here

Upload the itemized bill. BillFighter reads every line and flags the codes that may need more proof: a visit level the rest of the bill does not support, a procedure code that does not match the description, a quantity that does not add up. Checking a bill is free, and the free check includes a complete sample letter so you can see how the dispute reads.

A letter written for your own bill is part of the Fight Kit. You review every draft, you sign it, and you send it. With In Your Corner, BillFighter mails up to two of your approved letters by certified mail and tracks delivery. BillFighter does not call the other side, and it is not a law firm. Check my bill, free →

CPT® is a registered trademark of the American Medical Association.