Was called and told twice insurance will cover a hospital visit last month, today I got a letter saying “denied for not contracted service” Should I worry?

Was hospitalized for 4 days and I was 100% within my policy statement. I played it by the books and everything checked out. They called…

View More Was called and told twice insurance will cover a hospital visit last month, today I got a letter saying “denied for not contracted service” Should I worry?