A patient was discharged after being observed overnight. What is the likely second code to report for this visit?

The correct code to report for a patient who has been discharged after being observed overnight is 99217. This code specifically corresponds to a discharge service for a patient who has been in an observation status for less than 24 hours.

In this scenario, the key clinical detail is that the patient was observed overnight. The 99217 code is used to indicate a discharge from a health care facility, post-observation, and is appropriate in cases where the patient has spent time in an observation unit, without meeting criteria for inpatient admission.

The other codes pertain to different levels of observation or admission services. For example, codes 99218 to 99220 are used for initial observation care provided to patients who may require a higher level of medical decision-making or are undergoing a more significant assessment upon initial presentation. Since the question specifies a discharge after an overnight observation, these numbers do not apply to this situation.