What is the main term used in the alphabetic index of the cpt coding manual for unilateral x-ray of the hip single

The code which is listed for the procedure in the alphabetic index is 73501

The section of the CPT which manual tubular lists verified the code is the index.

The description of the given code matches the scenario. The main term which is used in this alphabetic index of the CPT coding manual is the service. 

Unilateral X-ray is the subterm which best identifies the reason for the procedure. The location of the procedure is being identified by the hip.

Read more on -

this protocol describes a detailed procedure for intracellular flow cytometry staining.

i'd say that the moon rock is about 2.2 billion years old.