Bring large saucepan of water to boil on high heat. Add noodles and chicken. Cook 8 min. or until chicken is cooked through and noodles are tender, adding broccoli to saucepan after 6 min. Drain noodle mixture; return to saucepan.

Add broth, cream cheese and mayo. Heat just to simmer on medium-low heat. Simmer 2 to 3 min. or until cream cheese is melted and sauce is well blended, stirring constantly.

Add shredded cheese; stir 1 min. or until melted. Sprinkle with chopped fresh parsley, if desired.