SILVER SPRING, Md. — Requiring patients to visit a hospital, clinic or medical office to get an abortion pill is needlessly risking their health during the COVID-19 pandemic, a group of physicians allege in a lawsuit that seeks to suspend the federal rule.

The federal lawsuit, which the American Civil Liberties Union filed Wednesday in Maryland, questions why patients can’t fill a prescription for mifepristone by mail. The U.S. Food and Drug Administration approved mifepristone to be used in combination with a second drug, misoprostol, to end an early pregnancy or manage a miscarriage.

“Of the more than 20,000 drugs regulated by the FDA, mifepristone is the only one that patients must receive in person at a hospital, clinic, or medical office, yet may self-administer, unsupervised, at a location of their choosing,” the lawsuit says.

The ACLU sued the FDA and U.S. Department of Health and Human Services on behalf of the American College of Obstetricians and Gynecologists and other groups. It marked the latest battle over access to abortions during the pandemic. Elsewhere, federal courts have heard cases involving access to abortion services as the outbreak continues.

More than four million people in the U.S. have used mifepristone and misoprostol to end an early pregnancy; the two-drug combination accounted for 39% of all U.S. abortions in 2017, the lawsuit says.

The lawsuit says the FDA rule has “particularly severe implications for low-income people and people of color, who comprise a disproportionate share of impacted patients and who are already suffering and dying from COVID-19 at substantially higher rates.”

“During the COVID-19 pandemic and associated unemployment crisis, low-income patients are particularly likely to struggle to pay for and arrange travel,” the suit says.

In 2017, the ACLU filed a lawsuit in Hawaii that challenged the FDA limits on where women can get the abortion pill. In January, a federal judge suspended the Hawaii case until the U.S. Supreme Court rules in a separate abortion-related lawsuit from Louisiana. The Louisiana case could determine whether doctors and clinics have a right to challenge abortion restrictions in federal courts.

Julia Kaye, staff attorney at the ACLU Reproductive Freedom Project, said the Trump administration apparently would rather endanger the lives of patients and doctors than lift “an unnecessary barrier to abortion care.”

“At every other turn during this pandemic, the federal government is trying to make it easier for patients to get the medical care they need without unnecessary health care visits that jeopardize their safety,” Kaye said.