A baby was treated with a nap and a bottle of formula. The bill was $18,000.

On the first morning of Jang Yeo Im’s vacation to San Francisco in 2016, her 8-month-old son, Park Jeong Whan, fell off the bed in the family’s hotel room and hit his head.

There was no blood, but the baby was inconsolable. Jang and her husband worried he might have an injury they couldn’t see, so they called 911, and an ambulance took the family — tourists from South Korea — to Zuckerberg San Francisco General Hospital (SFGH).

The doctors at the hospital quickly determined that baby Jeong Whan was fine — just a little bruising on his nose and forehead. He took a short nap in his mother’s arms, drank some infant formula and was discharged a few hours later with a clean bill of health. The family continued their vacation, and the incident was quickly forgotten.

Two years later, the bill finally arrived at their home: They owed the hospital $18,836 for a visit lasting three hours and 22 minutes, the bulk of which was for a mysterious fee for $15,666 labeled “trauma activation,” also known as “a trauma response fee.”

“It’s a huge amount of money for my family,” said Jang, whose family had travel insurance that would cover only $5,000. “If my baby got special treatment, OK. That would be OK. But he didn’t. So why should I have to pay the bill? They did nothing for my son.”

American hospital bills are today littered with multiplying fees, many of which don’t even exist in other countries: fees for blood draws, fees for checking the blood oxygen level with a skin probe, fees for putting on a cast, minute-by-minute fees for lying in the recovery room.

But perhaps the pinnacle is the “trauma fee,” in part because it often runs more than $10,000 and in part because it seems to be applied so arbitrarily.

A trauma fee is the price a trauma center charges when it activates and assembles a team of medical professionals that can meet a patient with potentially serious injuries in the ER. It is billed on top of the hospital’s emergency room physician charge and procedures, equipment and facility fees.

Emergency room bills collected by Vox and Kaiser Health News show that trauma fees are expensive and vary widely from one hospital to another.

Charges ranged from $1,112 at a hospital in Missouri to $50,659 at a hospital in California, according to Medliminal, a company that helps insurers and employers around the country identify medical billing errors.

“It’s like the Wild West. Any trauma center can decide what their activation fee is,” says Dr. Renee Hsia, director of health policy studies in the emergency medicine department at the University of California-San Francisco.

Hsia is also an emergency medicine doctor at Zuckerberg San Francisco General Hospital, but was not involved in the care of the patients discussed in the story — and spoke about the fees generally.

Read the full story at: https://bit.ly/2NDys1C