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.
Pepsi Zero Sugar (known as Diet Pepsi Max until early 2009 and Pepsi Max until August 2016), is a zero-calorie, sugar-free, carbohydrate-free, ginseng-infused cola sweetened with aspartame, marketed by PepsiCo. It has nearly twice the caffeine of Pepsi's other cola beverages.