Concussion w LOC of 30 minutes or less, subs

This code signifies a mild traumatic brain injury (concussion) where the patient experienced a brief period of unconsciousness, lasting 30 minutes or less. It indicates that the patient is presenting for follow-up care or management of residual symptoms related to an injury that occurred previously.

Apply this code when a patient is seen for ongoing evaluation, treatment, or monitoring of a concussion with brief loss of consciousness, after the initial acute phase of injury. Documentation should clearly state "concussion," "loss of consciousness 30 minutes or less," and indicate a "subsequent encounter" or follow-up visit.

• Ensure the documentation specifies "subsequent encounter" to differentiate from initial care (initial encounter codes end in A).
• Verify the duration of loss of consciousness; if unknown or greater than 30 minutes, a different code is required.
• Always sequence this code after any acute conditions or injuries being treated concurrently, unless it is the primary reason for the encounter.