Doctors, why are Non-MD's ordering imaging examinations?!

Doctors, why are Non-MD's ordering imaging examinations?

Does it bother the MD's out there that so many non-MD's, i.e. podicatrists, p.a.'s, and np's are ordering so many imaging tests? Is it appropriate for a podiatrist to order a vascular study like a venous doppler ultrasound of the leg, to r/o dvt? Most MD's understand that pedal edema is not an indication for this test, but a podiatrist will order one, and stat!? Is it appropriate for a PA to order an echocardiogram, or a CT scan? It seems that these non-MD's have been let off the leash, and are operating as MD's when they are not. It seems very inappropriate to me now, as it did 20 years ago, when this was not allowed to go on. Why is it permitted now? Obviously, most of the tests ordered by these non-MD's turn out to be normal, and essentially a waste of time and money. This has alot to do with the high cost of health care, and especially health insurance, and I think this should not be allowed to continue.

NPs and PAs can order diagnostic testing and or meds only if they are working under a MDs license and guidance. pedal edema, for example is by itself not a indication of possible DVT. but if its only in one foot, there is cooliness, numbess, pain, color difference, a doppler to r/o out dvt is very appropriate. Dvts can be dangerous.
The level of indepedence that a NP or PA have depends on the overseeing MDs confidence in their decision making. Most doctors not have enough time in day to completely see and assess all pts. Be assure that any test results are reviewed with MDs. Most testing done is usually negative. This is because generally to least expensive, most obvious and common problems most be rules out first. If you do not think that these health professionals are not looking attending to your health needs appropriately...you have a right to see the MD. I have worked with NPs for years..and feeling confident to trust my health and my family's to them..however they should take the time to explain tesing, possible diagnosis, and meds to you..they are there for you..and you need to ask questions. Be inforned. That said, rememnber like MDs, there are some better than others. Generally, if you trust your MD, you can trust their NP, PA,