The United States will need approximately 52,000 new primary-care doctors as the population grows and ages, according to a new study.

Research published in the Annals of Family Medicine estimated that most of the doctor shortage will be caused by the rising U.S. population but this change is also likely to be associated with new law in United States named as Obama-care by which many more Americans will get medical insurance.

U.S. population will swell up by 15.2 percent by 2025, to serve the expanded populace new physicians will be required.

Aging adults will create the need for an additional 10,000 physicians in that period. The Affordable Care Act (Obama-care); however will require another 8,000 physicians, a 3% increase in the current workforce of US physicians will be required for it.

The Association of American Medical Colleges (AAMC) has also estimated that the United States will be short more than 91,000 doctors by 2020 — 45,000 in primary care and 46,000 in surgery and medical specialties — as more Americans age.