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 Zero was Coca-Cola's largest product launch in 22 years. The global campaign was done by creative agency Crispin Porter + Bogusky. It is primarily marketed towards young adult males and has been nicknamed Bloke Coke in the UK.