Cook the rotini pasta according to package instructions; drain and set aside.
In a large skillet, combine the shredded chicken and buffalo sauce over medium heat.
Add cream cheese to the skillet and stir until melted and combined.
Mix in ranch dressing and half of the mozzarella cheese.
Add the cooked pasta to the skillet and toss to coat evenly.
Season with salt and pepper to taste.
Preheat your oven to 350°F (175°C).
Transfer the mixture to a baking dish and top with the remaining mozzarella cheese.
Bake for 15-20 minutes or until the cheese is bubbly and golden.
Remove from the oven and garnish with sliced green onions and parsley.