Nurse Practitioners: Nurse practitioners (NPs), who have nine to 24 months of education beyond an RN and some of whom have masters degrees, are allowed in some states to work "in collaboration" with physicians, consulting with them only as necessary. Other states require advanced practice nurses to work with varying degrees of physician supervision. There are about 25,000 NPs in practice, and the American Nurses Association says there are four job openings for every certified nurse practitioner. Their median income is in the $40,000 range.
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