After a thorough Hx and Px, I make a diagnosis and a treatment plan. Any PT or chiro can do this also.
Here's what I do as a Physiatrist, that no Physical Therapist or Chiropractor can do:
Where appropriate, I prescribe medications certified by the FDA as relatively safe and effective. I monitor the effects and adjust as neccesary. I don't prescribe things that say "This product is not intended to diagnose, treat, cure, or prevent any disease."
I do needle EMG's to validate the surface NCS I do. I don't use pre-made arrays such as NC-STAT and other designed to fleece patients and insurance companies. Ok, some chiros can do needle EMGs with specialized training, but I have yet to see one who really knew what they were doing.
I inject medications into specific areas of the body to diagnose and treat diseases and disorders. I know how to perform the procedures safely and effectively, and more importantly, I know when to do them.
Should I choose to do so, I could obtain more training and do even more advanced procedures, such as implanting pain and spasticity pumps, and spinal cord stimulators.
I do all of this with the advanced training of a PM&R to treat the whole patient, not just a body part, with therapies based more on science than anything.
Lastly, when people find out I am a doctor and ask what kind of doctor I am, they don't say "oh" in a disappointed fashion when they find out I'm an MD.