What is the appropriate code for a patient who was admitted for observation due to a possible concussion?

The appropriate code for a patient admitted for observation due to a possible concussion is 99218. This code is specifically used for an initial observation care service provided to a patient who requires observation, typically when a patient's condition is uncertain but may need more intensive evaluation and monitoring.

In this case, the patient has been admitted for a possible concussion, which necessitates a careful assessment, still corresponding with the criteria that define observation care. Code 99218 indicates that the patient is receiving a moderate level of complexity in care and requires at least a straightforward medical decision-making process, which aligns with evaluating a potential concussion.

Using this code adequately reflects the nature of the visit, focusing on the time spent in observation and the medical necessity for close monitoring.