Allergy tests can save your life if you have serious allergies. They are also quite inexpensive in most cases. The exact cost of an allergy test depends mostly upon the type of test and where it is performed. A consultation charge of $150 to $300 is first applied. A skin prick test costs an additional $60 to $300. The more thorough RAST blood test costs $200 to $1,000. Medical insurance often covers allergy tests, reducing the cost to about $25 in most cases.