person was brought doctor because he tried separate animals and he got bitten he not

A person was brought to the doctor because he tried to separate the animals and he got bitten. He not sure whether thee dog bit him or the raccoon. His forearm has a bite mark. The wound is bleeding and deep. There a tendon involvement. The nurse clean the wound and give him a tetanus shot. The wound was dressed to contol the bleeding. I need help finding the correct ICD-10-CM code.