Place the chicken, white beans, corn, green chilies, diced onion, garlic powder, cumin, oregano, salt, and pepper, and chicken broth into the slow cooker. Stir to combine.
1½ pounds boneless, 15 ounces white beans, 15 ounces sweet corn, 4 ounces mild diced green chilies, 1 small onion, 3 cups chicken broth, 1 teaspoon garlic powder, 1 teaspoon ground cumin, ½ teaspoon dried oregano, Salt and black pepper