Xue Y, et al. - Researchers assessed temporal trends in the distribution of primary care nurse practitioners (NPs) in low-income and rural areas vs distribution of primary care physicians (PCPs). They identified NPs as the largest and fastest growing group of non-physician primary care clinicians. In view of the persistence of the PCP shortage, understanding the trends in primary care NP supply, particularly in relation to populations most in need, seems valuable to inform strategies to strengthen primary care capacity.