There is already a shortage of doctors in many parts of the United States. The expansion of health care coverage to millions of uninsured Americans under the Affordable Care Act will make that shortage even worse. Expanding medical schools and residency programs could help in the long run.

But a sensible solution to this crisis — particularly to address the short supply of primary care doctors — is to rely much more on nurse practitioners, physician assistants, pharmacists, community members and even the patients themselves to do many of the routine tasks traditionally reserved for doctors.

There is plenty of evidence that well-trained health workers can provide routine service that is every bit as good or even better than what patients would receive from a doctor. And because they are paid less than the doctors, they can save the patient and the health care system money.

Here are some initiatives that use non-doctors to provide medical care, with very promising results:

PHARMACISTS A report by the chief pharmacist of the United States Public Health Service a year ago argued persuasively that pharmacists are “remarkably underutilized” given their education, training and closeness to the community. The chief exceptions are pharmacists who work in federal agencies like the Department of Veterans Affairs, the Department of Defense and the Indian Health Service, where they deliver a lot of health care with minimal supervision. After an initial diagnosis is made by a doctor, federal pharmacists manage the care of patients when medications are the primary treatment, as is very often the case.