ProPublica is keeping a list of who works for the Department of Government Efficiency, and we recently added 20 names to our tracker, bringing the total to 66.

We’ve also been reporting on who is in charge. Is it Elon Musk and his top lieutenants, or is it an obscure bureaucrat named Amy Gleason?

Health insurers reject millions of claims for treatment every year in America. But many of those who have had a claim denied don’t know about the information available to them.

When a health insurance company is deciding whether to pay for your medical treatment, the company generates a file around your claim. All the records associated with your case should be part of your file. This includes documents explaining the reasons your claim was denied.

You have a right to see this file.

As part of “Uncovered,” our series on health insurance denials, ProPublica reporters spoke with patients, health care providers, former and current health insurance employees and health policy experts to better understand how people facing denials can request their information. We created a guide to share what we’ve learned about this process, advice on requesting your claim file and answers to common questions you may have, including a template you can use to get your request started.