Which one of the following subcategories of the E/M section has separate codes for new and established patients?

A. Office or Other Outpatient Services
B. Hospital Observation Services
C. Initial Inpatient Consultation
D. Emergency Department Services

The correct answer is A. Office or Other Outpatient Services. The E/M (Evaluation and Management) section of the Current Procedural Terminology (CPT) codes has separate codes for new and established patients under the subcategory of Office or Other Outpatient Services. This subcategory includes services provided in an office or outpatient setting, such as routine check-ups or follow-up visits.

The answer to this question is A. Office or Other Outpatient Services.

To determine this, you can refer to the Current Procedural Terminology (CPT) codebook. The E/M section in the CPT codebook contains codes for Evaluation and Management services, which are used to report medical encounters with patients.

Within the E/M section, you'll find various subcategories that represent different types of medical services. Each subcategory may have its own set of guidelines and requirements for reporting codes.

In this case, you need to look specifically at the subcategories mentioned in the question. By referencing the CPT codebook, you will discover that the "Office or Other Outpatient Services" subcategory provides separate codes for new patients (those who haven't been seen by the physician or any other physician in the same specialty within the practice group within the past three years) and established patients (those who have had a previous professional service by the physician or any other physician in the same specialty within the practice group within the past three years).

Therefore, among the given options, the subcategory "Office or Other Outpatient Services" has separate codes for new and established patients.