A covid test costing more than a Tesla? It happened in Texas.

When covid-19 struck last year, Travis Warner's company became busier than ever. He installs internet and video systems, and with people suddenly working from home, service calls surged.

He and his employees took precautions like wearing masks and physically distancing, but visiting clients' homes daily meant a high risk of covid exposure.

"It was just like dodging bullets every week," Warner said.

In June 2020, an employee tested positive. That sent Warner and his wife on their own hunt for a test.

Because of limited testing availability at the time, they drove 30 minutes from their home in Dallas to a free-standing emergency room in Lewisville, Texas. They received PCR diagnostic tests and rapid antigen tests.

When all their results came back negative, it was a huge relief, Warner said. He eagerly got back to work.

Then the bill came.

The Patient: Travis Warner, 36, is self-employed and bought coverage from Molina Healthcare off the insurance marketplace.

Medical Service: Two covid tests: a diagnostic PCR test, which typically takes a few days to process and is quite accurate, and a rapid antigen test, which is less accurate but produces results in minutes.

Total Bill: $56,384, including $54,000 for the PCR test and the balance for the antigen test and an ER facility fee. Molina's negotiated rate for both tests and the facility fee totaled $16,915.20, which the insurer paid in full.

Service Provider: SignatureCare Emergency Center in Lewisville, one of more than a dozen free-standing ERs the company owns across Texas.

What Gives: Throughout the pandemic, stories of shockingly high prices for covid tests have abounded. A recent report from an insurance trade association noted that "price gouging by certain providers continues to be a widespread problem."

But Warner's PCR bill of $54,000 is nearly eight times the most notable charge previously reported, at $7,000 — and his insurer paid more than double that highest reported charge. Health policy experts KHN interviewed called Warner's bill "astronomical" and "one of the most egregious" they'd seen.

Yet it's perfectly legal. For covid tests — like much else in American health care — there is no cap to what providers can charge, said Loren Adler, associate director of the USC-Brookings Schaeffer Initiative for Health Policy.

Covid testing has been in a special category, however. When the pandemic hit, lawmakers worried people might avoid necessary testing for fear of the cost. So they passed bills that required insurers to pay for covid tests without copays or cost sharing for the patient.

For in-network providers, insurers can negotiate prices for the tests, and for out-of-network providers, they're generally required to pay whatever price the providers list publicly on their websites. The free-standing ER was out of network for Warner's plan.

While the policy was intended to help patients, health experts say, it has unintentionally given providers leeway to charge arbitrary, sometimes absurd prices, knowing that insurers are required to pay and that patients, who won't be billed, are unlikely to complain.

"People are going to charge what they think they can get away with," said Niall Brennan, president and CEO of the Health Care Cost Institute, a nonprofit that studies health care prices. "Even a perfectly well-intentioned provision like this can be hijacked by certain unscrupulous providers for nefarious purposes."

A report from KFF published earlier this year found that hospital charges for covid tests ranged from $20 to $1,419, not including physician or facility fees, which can often be higher than the cost of the tests themselves. About half the test charges were below $200, the report noted, but 1 in 5 were over $300.

"We observed a broad range of COVID-19 testing prices, even within the same hospital system," the authors wrote.

Realistically, the cost of a covid test should be in the double digits, Brennan said. "Low triple digits if we're being generous."

Medicare pays $100 for a test, and at-home tests are sold for as little as $24 for an antigen test or $119 for a PCR test.

Warner's charges were fully covered by his insurance.

But insurance policy premiums reflect how much is paid to providers. "If the insurance company is paying astronomical sums of money for your care, that means in turn that you are going to be paying higher premiums," Adler said.

Taxpayers, who subsidize marketplace insurance plans, also face a greater burden when premiums increase. Even those with employer-sponsored health coverage feel the pain. Research shows that each increase of $1 in an employer's health costs is associated with a 52-cent cut to an employee's overall compensation.

Even before the pandemic, wide variability in the prices for common procedures like cesarean sections and blood tests had been driving up the cost of health care, Brennan said. These discrepancies "happen every single day, millions of times a day."

Resolution: When Warner saw that his insurance company had paid the bill, he first thought: "At least I'm not liable for anything."

But the absurdity of the $54,000 charge gnawed at him. His wife, who'd received the same tests the same day at the same place, was billed $2,000. She has a separate insurance policy, which settled the claim for less than $1,000.

Warner called his insurer to see if someone could explain the charge. After a game of phone tag with the ER and the ER's billing firm, and several months of waiting, Warner received another letter from his insurer. It said they'd audited the claim and taken back the money they had paid the ER.

In a statement to KHN, a spokesperson for Molina Healthcare wrote, "This matter was a provider billing error which Molina identified and corrected."

SignatureCare Emergency Centers, which issued the $54,000 charge, said it would not comment on a specific patient's bill. However, in a statement, it said its billing error rate is less than 2% and that it has a "robust audit process" to flag errors. At the height of the pandemic, SignatureCare ERs faced "unprecedented demands" and processed thousands of records a day, the company said.

SignatureCare's website now lists the charge for covid tests as $175.

The Takeaway: Covid testing should be free to consumers during the public health emergency (currently extended through mid-October, and likely to be renewed for an additional 90 days). Warner did his insurer a big favor by looking carefully at his bill, even though he didn't owe anything.

Insurers are supposed to have systems that flag billing errors and prevent overpayment. This includes authorization requirements before services are rendered and audits after claims are filed.

But "there's a question of how well they work," Adler said. "In this case, it's lucky [Warner] noticed."

At least one estimate says 3% to 10% of health care spending in the U.S. is lost to overpayment, including cases of fraud, waste and abuse.

Unfortunately, that means the onus is often on the patient.

You should always read your bill carefully, experts say. If the cost seems inappropriate, call your insurer and ask them to double-check and explain it to you.

It's not your job, experts agree, but in the long run, fewer overpayments will save money for you and others in the American health care system.

Bill of the Month is a crowdsourced investigation by KHN and NPR that dissects and explains medical bills. Do you have an interesting medical bill you want to share with us? Tell us about it!

This article was reprinted from khn.org with permission from the Henry J. Kaiser Family Foundation. Kaiser Health News, an editorially independent news service, is a program of the Kaiser Family Foundation, a nonpartisan health care policy research organization unaffiliated with Kaiser Permanente.