Shares of healthcare giant CVS Health (CVS 1.83%) have been in a free fall this year. The company has failed to impress investors with its earnings numbers and has slashed its guidance multiple times. It has also made a change in CEO recently.However, with so much bearishness priced into its valuation these days and the stock trading at multi-year lows, there is a contrarian case to be made that it may be a potentially undervalued stock to own, if you're willing to buy and hold for the long term. Is CVS sto ...