Final answer:
The AIS code assigned to a patient with inadequate information regarding an injury is '9'.
Step-by-step explanation:
The AIS (Abbreviated Injury Scale) is a coding system used to classify and score injuries. When a patient's injury has inadequate information available, it is assigned an AIS code of '9'. This code is used to indicate that there is insufficient data to accurately classify the injury based on the criteria of the AIS. It is important for healthcare professionals to gather as much information as possible to ensure accurate coding and classification of injuries.