sign, symptom, or diagnosis, it is appropriate to assign both the V code and the code describing the reason for the non-routine test. 18
The difference is in the types of non -nutritive sweeteners used. Diet Coke has aspartame while Coke Zero has a mix of aspartame and acesulfame potassium. The beverages have different levels of sweetness and off tastes (I.e. high levels of aspartame have a metallic taste) as a result.
Coke is not healthier than Pepsi because both sodas contain very similar ingredients. The major difference between the two is the amount of sweetness. From a health perspective, both beverages are full of calories and sugar, making regular consumption a cause of health issues and weight gain.