It's unsurprising that United Health care would employ the imagery of apples to imply wholesomeness. Also they use one red apple, a Red Delicious in a set of green Granny Smith apples to indicate uniquemess in a sea of the banal and homogeneous.
Of course insurance companies are none of those things. They're all evil money-thieving whores bent on depriving care for the accumulation of wealth. All the same, all evil bastards. ...But symbolism isn't regulated by the FTC.