How many Review of Systems (ROS) are usually included for a complete ROS?

A complete Review of Systems (ROS) typically includes 14 systems, though answers might sometimes refer to different numbers based on various contexts. However, in traditional medical practice, the complete ROS generally encompasses systems that evaluate multiple aspects of the patient's overall health, covering areas such as general health, cardiovascular, respiratory, gastrointestinal, genitourinary, musculoskeletal, neurological, psychiatric, endocrine, skin, hematologic, and allergic/immunologic systems, as well as eyes, ears, nose, and throat (EENT).

While it’s understandable to see variations in interpretations and contexts, like the different settings or documentation specifics, reference to 10 systems reflects a more condensed version often seen in practical applications. This generally incorporates those critical systems most commonly evaluated in clinical assessments, focusing on the essentials for a thorough review without exhaustive detail in less frequent systems.

Therefore, the answer reflects a broader contextual understanding of how ROS are organized, even if the traditional and more detailed classification counts could potentially exceed or differ from the selected answer.