A person commits the criminal offense of intoxication assault if the person operates a motor vehicle while intoxicated and causes an accident that results in the serious bodily injury of another person.

Some states have a broader definition of intoxication assault and may charge an intoxicated person who negligently causes serious bodily injury to another person while operating a motor vehicle, an aircraft, a watercraft, or an amusement ride with the crime of intoxication assault.

Intoxication assault is a felony offense and may be punished by significant jail or prison time. Intoxication assault laws are generally located in a state's statutes—often in the penal or criminal code.

In Missouri, the offense of operating a vehicle while intoxicated and causing an accident that results in serious bodily injury to another person is typically referred to as 'Assault in the Second Degree' when it involves intoxication. Under Missouri law, specifically Section 565.060 of the Revised Statutes of Missouri, a person commits the offense of assault in the second degree if he or she operates a vehicle while intoxicated and, as a result, causes physical injury to another person through criminal negligence. This offense is classified as a Class D felony, which can result in significant penalties, including potential imprisonment, fines, and a criminal record. The exact punishment can vary based on the circumstances of the case and the defendant's criminal history. It's important to note that Missouri law does not use the term 'intoxication assault,' but the described conduct falls under the broader category of assault offenses involving vehicular accidents and intoxication.