In ICF coding, what does B stand for?

• A. Functions
• B. Structures
• C. Environmental Factors
• D. Activities and Participation

Answer: (A)

The key idea is how ICF codes map letters to parts of functioning. In ICF, the codes with the prefix B refer to Body Functions—that is, the physiological functions of body systems.

So, B stands for Body Functions. The other domains are Body Structures (prefix S), Activities and Participation (prefix D), and Environmental Factors (prefix E). That means options naming “Structures,” “Environmental Factors,” or “Activities and Participation” point to the other domains, not the B category.

Given the options, the one that aligns with B is “Functions,” which is shorthand for Body Functions. This is why that choice is the best answer.