The classes of main entries found in the CPT® index include all of the following EXCEPT:

________ is the amount of energy required to raise one kg of water one degree centigrade

A) One microcalorie B) Caloric output C) One calorie D) One megacalorie

How many digits are the codes in the ICD-9 manual?

a. 3 b. 5 c. 7 d. 9