The U.S. is the world's most lucrative healthcare market, with the country spending more than $12,000 per capita. That's roughly $5,000 more than Germany, the runner-up country.

Pharmacy giant CVS Health (NYSE: CVS) has invested plenty of money and effort to help it evolve from its pharmacy roots into a diversified healthcare conglomerate. It hasn't been a smooth ride; share prices are down nearly 40% from their highs in 2015.

But the good times could be on the way. Here are three reasons you should consider buying CVS stock as a long-term investment and one potential flaw that could make it all crumble.

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Source Fool.com