Dice all the vegetables. In a dutch oven, add chicken, celery, carrots, potatoes, green peppers, tomatoes, garlic, parsley, red pepper, salt, and pepper, water, and chicken broth. Partially cover and bring to a boil over medium-high heat. Reduce heat to a simmer. Cook until the chicken falls apart easily and the vegetables are tender (approximately 30-40 minutes).
Remove the chicken using tongs. Add pasta, stir several times throughout cooking to prevent sticking. Cook pasta (12-14 minutes) or cook until pasta is al dente (undercook pasta slightly as the pasta will continue to cook after heat is turned off). While the noodles cook, shred the chicken and discard the skin and bones. Return the chicken back to the pot once noodles are cooked, stir then serve.
Store in an airtight container in the refrigerator for 4-5 days.