The largest portion of the brain, which is commonly referred to as the ''gray matter,'' is called the:

________ The eye ages just like the rest of the body

Indicate whether the statement is true or false

Which are qualifying terms located after ICD-10-CM index main terms, which do not have to be included in the diagnostic or procedural statement for the code number listed after the parentheses to be assigned?

a. essential modifiers b. inclusion terms c. nonessential modifiers d. subterms