From a New York Times online article:
If one geriatrician can care for 700 patients with complicated medical needs, as a federal model estimates, then the nation will need 33,200 such doctors in 2025. It has about 7,000, only half of them practicing full time. (They’re sometimes confused with gerontologists, who study aging, and may work with older adults, but are not health care providers.)
Geriatrics became a board-certified medical specialty only in 1988. An analysis published in 2018 showed that over 16 years, through academic year 2017-18, the number of graduate fellowship programs that train geriatricians, underwritten by Medicare, increased to 210 from 182. That represents virtually no growth when adjusted for the rising United States population.
“It’s basically stagnation,” said Aldis Petriceks, the study’s lead author, now a medical student at Harvard.