A baby was treated with a nap and a bottle of formula. His parents received an $18,000 bill.

Just normal healthcare things:

On the first morning of Jang Yeo-im’s vacation to San Francisco in 2016, her eight-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.
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 the 3 hour and 22 minute visit, the bulk of which was for a mysterious fee for $15,666 labeled “trauma activation,” which sometimes is known as “a trauma response fee.”...