If you need medical/health protection, you should go for medical/health plan only.
Many people don't like medical plans especially those plan provide no money back. However, this is exactly what we need at the lowest price.
If you want to invest, you should put your money into other plans.
Let me ask you one question. What is the extra costs you need to pay for medical plans with cash back? What if you buy mecial plans without cash back & put the extra money into another investment plan? Do you know the later option will work for you with a better return?