UNSPLASH As health care companies grow larger, so are patient costs but federal regulators have been slow to confront the issue during the Trump administration. A cancer patient might live in a town with four oncology groups, but only one accepts his insurance — the one owned by his insurer. A young couple could see huge bills after their child is born, because their insurer agreed to the health system’s rates in exchange for a contract with obstetricians across the country.