Pain in neck & shoulder blade, numbness, tingling & pain in hand. fingers go numb & neck hurts bad when on stomach with arm straight above head. every test for nerve entrapment in wrist & elbow normal. could trapped nerve in neck be causing this?

I suspect a nerve impingement on a nerve root exiting the neck caused by a bulging intervertebral disc or a spur. An MRI of your neck would be a worthwhile test to help detect the cause of your discomfort.

Assume an MRI of the neck has been done, but if not, needs to be accomplished to be complete. EMG studies need to be done by a practitioner familiar with appropriate techniques to assess brachial plexus pathology. Unlikely that the location is proximal as more likely over the shoulder area.