yes, but the actual amount of current that your organs are exposed to depends on the the resistance and voltage. that's why you can't electrocute yourself by putting your fingers on a 9v battery even though it's well over 200mA.
https://www.youtube.com/watch?v=wi-b9k-0KfE
https://www.youtube.com/watch?v=dfJ3Ui8IS04
http://www.epanorama.net/newepa/2016/10/25/cheap-usb-charger...
I have also seen a few videos of teardowns of actual faulty chargers. For example, there was one where some of the insulation in the transformer windings were damaged, and you would get a continuous shock just by touching the LV side of any devices that are plugged in.
If you break the skin a 9v battery can kill.
Essentially you'd have to get a conductor into an artery and one into a vein, and if there is a millisecond where both are in there but not touching the skin your heart will stop. It can be restarted for a minute or so afterwards, but it won't restart on it's own.
Your skin has a "safe" (more or less) conductive layer to prevent this from occurring, with another layer with enormous insulation below that. That's why humans usually survive getting hit by lightning, yet succumb to such a stupid tiny amount of current if it gets past the skin.
Remember that heating follows P = I^2 R law, so it is entirely reasonable that the conductors wouldn't melt before the attached person dies. Current across the heart is not the only way to die from electricity, but it's not really that hard to accidentally get current across the heart anyway. For example, if your arm touches the energized phone case and your leg brushes against a metal pipe in the house, that could easily complete a lethal circuit.