Heat a large skillet over medium heat and add the ground turkey. Cook until it is no longer pink, breaking it up as it browns.
Add the chopped onion and minced garlic to the skillet. Stir and cook for 2 to 3 minutes until the onion softens.
Transfer the turkey mixture to the slow cooker. Add the white beans, diced green chilies, chicken broth, cumin, chili powder, and oregano.
Stir everything together and season with salt and black pepper.
Cover and cook on low for 6 to 8 hours.
Stir the chili before serving to check the consistency.