The following questions may require the use of an ICD-9-CM code book to select the correct answer.

Biopsy of the gum is coded to procedure code __________

Which of the following procedures is an example of guided bone regeneration?

A) Socket preservation B) Increasing ridge height C) Regeneration in furcation defects D) Sinus lift

Miotic muscarine agonists are agents that constrict the:

A. sclera B. pupils C. canals D. choroid layer