“CAT scan donut” (CC BY 2.0) by .:. brainsik. On average, the cost of pet scan can be anywhere from $1,500 to as much as $9,500 without health insurance. The cost will depend on which facility you use and where you live. For example, a whole body scan could cost about $4,500, while a PET scan of the brain and heart could cost closer to $7,000.