“We already have rationed healthcare”

One of the rants of the anti-healthcare-reform crowd is “ObamaCare” (their term) will institute rationed healthcare.
A guy I know of has lung cancer, so his doctor prescribed a PET-scan.
His healthcare insurance disagreed.
Said he didn’t need it.
His doctor said he did, yet his healthcare insurance says he doesn’t, and won’t pay for it.
“We already have rationed healthcare,” my wife declared.