1 On average, the cost of a full body MRI ranges from $200 to $3,500 depending on where you go and what you get. 2  An MRI costs, on average, is around $1,000 to $3,000. Usually, a multi-organ MRI that requires a contrast can cost the most. 2  You can check out Comparemricost.com for a list of MRI costs in various locations in the United States. 3  Costs vary depending on the testing facility location. 4  Here, the average cost of an MRI ranges around $1,694 to $3,624.