Can I reopen the case I have extremely shoulder pain after car accident?

It is difficult to give you a complete answer as there was insufficient information provided in your question. In Michigan when someone is injured in a motor vehicle accident, there are two independent claims potentially. The first is for PIP (Personal injury protection benefits) for things such as medical, wage loss and other economic losses suffered due to the injuries from the accident. The second claim arising out of a motor vehicle accident, assuming that the no-fault tort threshold is met, would be a bodily injury claim for non-economic damages, such as pain and suffering. The applicable statute of limitations on a bodily injury claim in Michigan is three years from the accident date. I am assuming that you never made a bodily injury (BI) claim arising out of the 2010 auto accident, but perhaps only a PIP claim for your medical expenses. If you did make a BI claim, but did not resolve it, or file suit against the at-fault parties before the three year statute of limitations ran, you would be barred from any recovery by operation of the statute of limitations. Hope this helps.