DENVER — In February, Norma Brambila’s teenage daughter wrote her a letter she now carries in her purse. It is a drawing of a rose, and a note encouraging Brambila to “keep fighting” her sickness and reminding her she’d someday join her family in heaven.

Brambila, a community organizer who emigrated from Mexico a quarter-century ago, had only a sinus infection, but her children had never seen her so ill. “I was in bed for four days,” she said.

Lacking insurance, Brambila had avoided seeking care, hoping garlic and cinnamon would do the trick. But when she felt she could no longer breathe, she went to an emergency room. The $365 bill — enough to cover a week of groceries for her family — was more than she could afford, pushing her into debt. It also affected another decision she’d been weighing: whether to go to Mexico for surgery to remove the growth in her abdomen that she said is as big as a papaya.

Brambila lives in a southwestern Denver neighborhood called Westwood, a largely Hispanic, low-income community where many residents are immigrants. Westwood is also in a ZIP code, 80219, with some of the highest levels of medical debt in Colorado. More than 1 in 5 adults there have historically had unpaid medical bills on their credit reports, more in line with West Virginia than the rest of Colorado, according to 2022 credit data analyzed by the nonprofit Urban Institute.