Final answer:
The appropriate code for an Established Patient with a detailed history, detailed exam, and moderate medical decision-making, along with a presenting problem that is moderate to high, is 99214.
Step-by-step explanation:
The code that would be used for an Established Patient when doing a "Detailed history, Detailed exam, Moderate medical decision; Presenting problem: moderate to high: avg. time: 25 minutes" is 99214. This CPT code is typically used for office or other outpatient visits for the evaluation and management of an established patient. The choice of this code is based on the level of detail in the history and physical exam, the complexity of the medical decision making, as well as the total time spent on the encounter. When a visit includes a detailed history and exam and moderate complexity decision-making, or an average face-to-face time of about 25 minutes, 99214 is the appropriate code to use.