What Is Upcoding and Why Is It So Common?

Upcoding happens when a hospital, clinic, or provider assigns a billing code that represents a more expensive service than what was actually performed. Instead of billing for a routine office visit, for example, they bill for a complex consultation. The difference in codes can mean a difference of hundreds of dollars — and insurers or patients often pay without question.

It is shockingly common. A 2022 report from the Department of Health and Human Services found that hospitals overbilled Medicare alone by billions of dollars annually, with upcoding identified as a leading cause.

The reasons it persists are simple:

  • Medical bills are intentionally difficult to read
  • Most patients never request an itemized statement
  • Insurance companies audit only a fraction of claims
  • Hospitals face little immediate consequence when errors go unchallenged

The 4 Most Common Upcoding Schemes on Hospital Bills

Knowing what to look for puts you ahead of the problem. These are the most frequently documented upcoding tactics used against patients and insurers:

  • Level of care inflation: Billing for a higher-complexity visit (Level 4 or 5) when your appointment was routine (Level 2 or 3). This is the single most common form of upcoding.
  • Upgraded room or facility charges: Charging for an intensive care unit stay when you were in a standard medical bed.
  • Procedure complexity bumping: Billing for a complex surgical code when a simpler procedure was performed.
  • Unbundling disguised as upcoding: Separating steps of one procedure into multiple high-cost line items rather than using one bundled code, effectively inflating the total.

Each of these schemes exploits the gap between what happened in the room and what appears on paper.

How to Read Your Bill and Spot an Upcoded Charge

The first step is always requesting an itemized bill. The summary statement most hospitals send by default hides the detail you need.

Once you have an itemized bill, look for these red flags:

  • CPT codes that don't match what your doctor described or what appears in your medical records
  • An Evaluation and Management (E/M) code of 99214 or 99215 for what felt like a quick, uncomplicated visit
  • Charges for services on days you were not at the facility
  • Duplicate line items for the same service
  • Room and board codes that list ICU rates when you were in a general ward

Compare your bill against your Explanation of Benefits from your insurer. If the two documents describe services differently, that discrepancy is worth investigating. Your medical records are your most powerful verification tool — you have a legal right to request them.

What the DOJ and CMS Crackdown Means for Patients Right Now

The Department of Justice and the Centers for Medicare and Medicaid Services have significantly increased upcoding enforcement over the past three years. Major health systems have paid hundreds of millions in settlements related to inflated Evaluation and Management codes and improper inpatient admission billing.

What this means for you practically:

  • Hospitals are under greater scrutiny, which creates an opening for patients who formally dispute charges
  • CMS now requires hospitals to post machine-readable price files, giving you a benchmark to compare against your bill
  • Whistleblower cases brought by hospital employees are increasing, which means internal pressure on billing departments is rising

The enforcement climate has shifted in patients' favor. A formal, documented dispute is taken more seriously today than it was five years ago. You are no longer fighting alone — regulators are watching the same patterns you might spot on your own bill.

How to Dispute an Upcoded Charge (Step-by-Step)

Disputing an upcoded charge does not require a lawyer. It requires documentation, persistence, and the right sequence of steps.

  • Step 1: Request your itemized bill in writing and your complete medical records for the date of service.
  • Step 2: Cross-reference every CPT and ICD-10 code on the bill against your records. Free lookup tools at the CMS website can help you decode what each code means.
  • Step 3: Write a formal dispute letter to the hospital billing department, identifying the specific codes you believe are incorrect and citing your medical records as evidence.
  • Step 4: Send a copy of your dispute to your insurance company and ask them to open their own review.
  • Step 5: If the hospital refuses to correct the charge, file a complaint with your state insurance commissioner and, for Medicare or Medicaid claims, with CMS directly.

Document every phone call with dates, names, and what was said.

Medical billing errors, including upcoding, are far more common than most people realize, but they are not inevitable — and they are not something you have to accept. If your bill doesn't add up, the smartest next step is a professional audit. Start yours today at https://verifydoc.net and find out exactly what you've been charged for.

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Frequently asked questions

Is upcoding illegal?

Yes. Upcoding is considered healthcare fraud under federal law, including the False Claims Act. When it affects Medicare or Medicaid, it can result in significant civil and criminal penalties for providers. For private insurance, it violates policy terms and can constitute insurance fraud. However, hospitals often argue that ambiguous documentation caused the error rather than intentional fraud, which is why patient disputes and audits are so important in holding billing departments accountable.

How do I get an itemized hospital bill?

You have the right to request an itemized bill from any hospital or healthcare provider. Contact the billing department directly, either by phone or in writing, and specifically ask for an itemized statement that lists every service, supply, and charge with its corresponding billing code. Some hospitals will provide this automatically; others require a formal written request. Keep a copy of your request and note the date you sent it. If you are also requesting your medical records, you can often submit both requests at the same time.

What if my insurance already paid the bill — can I still dispute an upcoded charge?

Yes, and you should. Even if your insurer paid the claim, you may have been responsible for a copay, coinsurance, or deductible based on an inflated charge. Correcting an upcoded code can reduce your share of the cost retroactively. You can dispute with the hospital billing department and also notify your insurance company, which has its own financial interest in recovering overpayments. Some states also allow patients to file complaints on behalf of their insurer when fraud is suspected.