Nurse practitioners are increasingly filling a gap that is expected to widen as the senior population explodes and the number of geriatricians declines. The Health Resources and Services Administration projects a 50% increase in demand for geriatricians from 2018 to 2030, when the entire baby boom generation will be older than 65. By then, hundreds of geriatricians are expected to retire or leave the specialty, reducing their number to fewer than 7,600, with relatively few young doctors joining the field.

That means many older adults will be relying on other primary care physicians, who already can’t keep up with demand, and nurse practitioners, whose ranks are booming. The number of nurse practitioners specializing in geriatrics has more than tripled since 2010, increasing the availability of care to the current population of seniors, a recent study in JAMA Network Open found.

According to a 2024 survey, of the roughly 431,000 licensed nurse practitioners, 15% are, like Johnson, certified to treat older adults.