Final answer:
Code C. 99305 is used for the admission of a patient to a skilled nursing facility when a comprehensive history, detailed exam, and moderate MDM are involved.
Step-by-step explanation:
The correct answer to the question of which code should be used for the admission of a patient to a skilled nursing facility involving a comprehensive history, detailed exam, and moderate Medical Decision Making (MDM) is code C. 99305. This specific code is part of the Current Procedural Terminology (CPT) set and is designed for initial care when the requirements listed are met. Codes 99304-99306 are for initial admissions, and among them, 99305 is the one that covers detailed examinations and moderate complexity MDM.