CPB (Certified Professional Biller) Certification Practice Exam

What is the meaning of the prefix "extra-"?

1. nervous sensation

2. cause

3. out, away from

4. outside

The correct answer is: outside

The prefix "extra-" comes from Latin, meaning "outside" or "beyond." This prefix is commonly used in various contexts to indicate something that is additional or outside of the usual limits. For instance, in the word "extraterrestrial," it refers to beings or things that are beyond or outside of Earth. This aligns with its definition as suggesting externality or additionality, thus reinforcing that the meaning of "extra-" is indeed related to the idea of being "outside." In contrast, the other options provided do not accurately reflect the definition of "extra-." Describing it as "nervous sensation," "cause," or "out, away from" does not capture the essence of the prefix. While "out, away from" might seem somewhat close, "extra-" specifically conveys the notion of being beyond a certain boundary or limit, which is more definitively captured by "outside." Understanding these distinctions helps clarify the use of prefixes in medical billing and coding, enhancing communication and accuracy in documentation.