electromyography (emg) nerve conduction studies (ncs)

Is it possible physician order emg only without ncv? Patient complains of numbness, tingling sensation, no muscle weakness reported. How frequent? What is the clinical rationale?

These tests are done to see how bad you nerves are and usually done together. The also target specific nerves to see which ones are causing you problems.
However, MRI's should be done first, with and without contrast. Then possibly ct scan, then if needed these nerve tests, to see if you need surgery and to give your doctor more information as to what disc needs the most repairs should surgery be needed.
Nerve testing is not aways the best or mosts reliable test, but its a good base tests only after mrs and cts are done. Then sometimes its not needed after getting mris and cts done.
Whatever you do, walk away from any doctor that suggests a discogram...
Hope this info helps and if you have further questions, write them down and take them with you to your doctor appointment. The best question to ask your doctor is: "Is this tests needed or the bests tests for me and if you were me would you submit yourself to this tests.?"
That's what you should ask your doctor.