American Academy of Professional Coders (AAPC) Practice Exam

What prefix describes a single unit or occurrence?

1. Diá-

2. Mon/o

3. Pro-

4. Pre-

The correct answer is: Mon/o

The prefix that describes a single unit or occurrence is "Mon/o." This prefix originates from the Greek word "monos," which means "single" or "alone." It is commonly used in medical terminology to indicate a singular condition or entity. For example, "monotherapy" refers to the use of a single drug or treatment for a condition, highlighting its focus on a singular approach. Understanding the meaning behind prefixes can significantly enhance comprehension in medical coding and terminology. While the other prefixes have their own specific meanings—such as "Diá-" meaning "two" or "double," "Pro-" often denoting something that comes before or in favor of, and "Pre-" meaning "before"—these do not convey the concept of singularity that "Mon/o" expresses. Recognizing these nuances is essential in accurately interpreting and utilizing medical terms in practice.