Large coverage expansions under the Affordable Care Act have reignited concerns about physician shortages. The Association of American Medical Colleges (AAMC) continues to forecast large shortfalls (130,000 by 2025) and has pushed for additional Medicare funding of residency slots as a key solution.
These shortage estimates result from models that forecast future supply of, and demand for, physicians – largely based on past trends and current practice. While useful exercises, they do not necessarily imply that intervening to boost physician supply would be worth the investment. Here are a few reasons why.
1. Most physician shortage forecast models assume insurance coverage expansions under the ACA will generate large increases in demand for physicians. The standard underlying assumption is that each newly insured individual will roughly double their demand for care upon becoming insured (based on the observation that the uninsured currently use about half as much care). However, the best studies of this – those using randomized trials or observed behavior following health insurance changes – tend to find increases closer to one-third rather than a doubling.
2. A recent article in Health Affairs found that the growing use of telehealth technologies, such as virtual office visits and diagnoses, could reduce demand for physicians by 25% or more.
3. New models of care, such as the patient-centered medical home and the nurse-managed health center, appear to provide equally effective primary care but with fewer physicians. If these models, fostered by the ACA, continue to grow, they could reduce predicted physician shortages by half.
