The Chicago Tribune Jon Yates What's Your Problem? column.

Byline: Jon Yates

May 17--Fernando Mendoza had insurance when doctors inserted a catheter to deliver his chemotherapy last July. The procedure was covered by his HMO, Blue Cross and Blue Shield of Illinois. But almost 10 months after Mendoza received the catheter--and nearly three months after he died of esophageal cancer--his widow continued to receive statements showing $1,743 was unpaid. Thinking she was being billed, Suzanne Mendoza said she called Blue Cross several times and was told the doctor submitted the claim too late to be covered. The…