What is the purpose of a Terminology Service RESTful API?

• A. To store binary data
• B. To allow applications to use codes and value sets without deep knowledge of code systems
• C. To provide a user interface for data entry
• D. To manage patient demographics

Answer: (B)

A Terminology Service RESTful API is designed to give applications a standardized way to work with medical codes and value sets without needing to know the inner details of each code system. It provides operations to look up codes, validate that a code exists in a system, expand a value set into its constituent codes, and translate or map codes across systems. This abstraction lets different systems and apps reuse terminology consistently, supporting interoperability and reliable data exchange in EHRs and clinical decision support. It’s not intended for storing binary data, providing a user interface for data entry, or managing patient demographics, which are handled by other parts of the healthcare IT stack.