Combine the stock, coconut milk, miso, and turmeric in a stockpot; whisk to combine.
Add the vegetables and noodles. Bring to a boil. Add the shrimp. Cover and cook 2-4 minutes, or until the shrimp are cooked through. Season to taste with salt and lime juice.
Serve immediately.
Notes
Look for vegetable stock without tomatoes or tomato paste. There are a few brands that fit the bill, but I've found that Swanson is the most readily available.