For the following questions, use an ICD-9-CM code book and select the appropriate code(s) for the diagnostic phrases given

Breathing is controlled by what part of the brain?

a. Hypothalamus b. Cerebellum c. Pons d. Medulla oblongata

During the month of August, what are the maximum total "units of service" allowed?

A. four B. twelve C. twenty-four D. thirty-one