By JAY HANCOCK 
The Maryland Proton Treatment Center chose “Survivor” as the theme for its grand opening in 2016, invoking the reality-TV show’s tropical sets with its own Tiki torches, palm trees and thatched booths piled with pineapples and bananas.

It was the perfect motif for a facility dedicated to fighting cancer. Jeff Probst, host of CBS’ “Survivor,” greeted guests via video from a Fiji beach.

But behind the scenes, the $200 million center’s own survival was less than certain. Insurers were hesitating to cover procedures at the Baltimore facility, affiliated with the University of Maryland Medical Center. The private investors who developed the machine had badly overestimated the number of patients it could attract. Bankers would soon be owed repayment of a $170 million loan.

Only two years after it opened, the center is enduring a painful restructuring with investors poised for huge losses. It has never made money, although it has ample cash to finance operations, said Jason Pappas, its acting CEO since November. Last year it lost more than $1 million, he said.

Volume projections were “north” of the current rate of about 85 patients per day, Pappas said. How far north? “Upper Canada,” he said.

For years, health systems rushed enthusiastically into expensive medical technologies such as proton beam centers, robotic surgery devices and laser scalpels — potential cash cows in the one economic sector that was reliably growing. Developers got easy financing to purchase the latest multimillion-dollar machine, confident of generous reimbursement.

There are now 27 proton beam units in the United States, up from about half a dozen a decade ago. More than 20 more are either under construction or in development.

But now that employers, insurers and government seem determined to curb growth in health care spending and to combat overcharges and wasteful procedures, such bets are less of a sure thing.

The problem is that the rollicking business of new medical machines often ignored or outpaced the science: Little research has shown that proton beam therapy reduces side effects or improves survival for common cancers compared with much cheaper, traditional treatment.

If the dot-com bubble and the housing bubble marked previous decades, something of a medical-equipment bubble may be showing itself now. And proton beam machines could become the first casualty.

“The biggest problem these guys have is extra capacity. They don’t have enough patients to fill the rooms” at many proton centers, said Dr. Peter Johnstone, who was CEO of a proton facility at Indiana University before it closed in 2014 and has published research on the industry. At that operation, he said, “we began to see that simply having a proton center didn’t mean people would come.”

Sometimes occupying as much space as a Walmart store and costing enough money to build a dozen elementary schools, the facilities zap cancer with beams of subatomic proton particles instead of conventional radiation. The treatment, which can cost $48,000 or more, affects surrounding tissue less than traditional radiation does because its beams stop at a tumor rather than passing through. But evidence is sparse that this matters.

And so, except in cases of childhood cancer or tumors near sensitive organs such as eyes, commercial insurers have largely balked at paying for proton therapy.

“Something that gets you the same clinical outcomes at a higher price is called inefficient,” said Dr. Ezekiel Emanuel, a health policy professor at the University of Pennsylvania and a longtime critic of the proton-center boom. “If investors have tried to make money off the inefficiency, I don’t think we should be upset that they’re losing money on it.”

Investors backing a surge of new facilities starting in 2009 counted on insurers approving proton therapy not just for children, but also for common adult tumors, especially prostate cancer. In many cases, nonprofit health systems such as Maryland’s partnered with for-profit investors seeking high returns.

Companies marketed proton machines under the assumption that advertising, doctors and insurers would ensure steady business involving patients with a wide variety of cancers. But the dollars haven’t flowed in as expected.

Indiana University’s center became the first proton-therapy facility to close following the investment boom, in 2014. An abandoned proton project in Dallas is in bankruptcy court.

California Protons, formerly associated with Scripps Health in San Diego, landed in bankruptcy last year.

A number of others, including Maryland’s, have missed financial targets or are hemorrhaging money, according to industry analysts, financial documents and interviews with executives.

“In any industry that’s really an emerging industry, you often have people who enter the business with over-exuberant expectations,” said Scott Warwick, executive director of the National Association for Proton Therapy. “I think maybe that’s what went on with some of the centers. They thought the technology would grow faster than it has.”

In the absence of evidence showing protons produce better outcomes for prostate, lung or breast cancer, “commercial insurers are just not reimbursing” for these more common tumors, said Brandon Henry, a medical device analyst for RBC Capital Markets.

The rebellion by private insurers “is very, very good” and may signal the health system “is finally figuring out how to say no to low-value procedures,” said Amitabh Chandra, a Harvard health policy professor who has called proton facilities unaffordable “Death Stars.”

Proton centers are fighting back, enlisting patients, legislators and nonprofits to push for reimbursement. Oklahoma has passed and Virginia has considered legislation to effectively require insurers to cover proton therapy in more cases.

To make the finances work, hospitals are combining forces. The first proton beam center in New York City is under construction, a joint project of Memorial Sloan Kettering, Mount Sinai and Montefiore Health System.

Smaller facilities, which can cost less than $50 million, should be able to keep their rooms full in many major metro areas, said Prakash Ramani, a senior vice president at Loop Capital, which is helping develop such projects in Alabama, Florida and elsewhere.

Kaiser Health News is an editorially independent program of the Henry J. Kaiser Family Foundation, a nonprofit, nonpartisan health policy research and communication organization not affiliated with Kaiser Permanente. https://khn.org/