Samantha Raphelson

One of the main principles behind purchasing health insurance is protection in the event of an emergency.

But in the case of Anthem, the nation's second-largest insurer, policy holders may be denied coverage if the company considers their visit to the emergency room unnecessary.

A rare form of eye cancer has struck a group of people in two locations in North Carolina and Alabama, confounding medical experts who are trying to determine whether the cases are linked.

Ocular melanoma typically affects 6 out of every 1 million people, but doctors have found dozens of cases where those affected have ties to either Huntersville, N.C., or Auburn, Ala. Many of those diagnosed attended Auburn University between 1983 and 2001 — at least three of them were friends.

The growing momentum for tighter gun control after the deadly school shooting in Parkland, Fla., is highlighting the National Rifle Association's history of aggressively confronting challenges to what it regards as Second Amendment rights.

Federal limits on both research into gun violence and the release of data about guns used in crimes are powerful reminders of the lobbying group's advantages over gun control activists. For decades, the NRA pushed legislation that stifled the study and spread of information about the causes of gun violence.

Updated on Sunday at 10:00 a.m. ET

Hundreds of thousands of students, teachers, parents and victims rallied in Washington, D.C., and across the country on Saturday to demand tougher gun control measures, part of a wave of political activism among students and others impacted by school shootings.

A growing shortage of psychiatrists across the U.S. is making it harder for people who struggle with mental illness to get the care they need — and the lack of federal funding for mental health services may be to blame.

Nearly 40 years of violent conflict is driving a growing mental health crisis in Afghanistan.

Alabama filed a lawsuit in federal court on Tuesday against OxyContin producer Purdue Pharma LP claiming the drug company is fueling the opioid epidemic by deceptively marketing prescription painkillers.

The state alleges that Purdue failed to accurately portray the risks and benefits of opioids, which enabled doctors to widely prescribe them in the treatment of pain. Alabama becomes the latest in a flood of lawsuits by states, counties and cities against drug makers in response to the opioid crisis.

The death of a former major league baseball player in his native Venezuela this week is renewing concerns over the Latin American country's growing health crisis amid ongoing economic and political turmoil.

Coca-Cola introduced four new fruit-flavored versions of Diet Coke this week in an effort to entice former soda drinkers and LaCroix-guzzling seltzer lovers.

The new flavors — Feisty Cherry, Twisted Mango, Ginger Lime and Zesty Blood Orange — are sold in slimmer, redesigned cans. They were launched as part of the beverage company's endeavor to offset slumping Diet Coke sales, which have steadily declined since the height of soft-drink consumption in the mid-2000s.

It's that time of year when a simple walk down the street can be a treacherous undertaking because of the icy sidewalks.

Emergency rooms in the U.S. treat more people injured in falls than for any other kind of injury, according to the Agency for Healthcare Research and Quality. The agency estimates that falls account for more than a third of all injury-related ER visits. Even though most of those injuries happen to older people, falls happen at any age and can cause serious injury.

Updated at 1:07 p.m. ET

President Trump insisted Saturday that he is "a very stable genius," following the recent publication of a book that raises questions about his mental state and fitness for office.

Speaking to reporters at Camp David on Saturday, Trump called Michael Wolff, author of Fire and Fury: Inside The Trump White House, "a fraud" and reiterated his earlier claim on Twitter that Wolff is not trustworthy.

Forty-three of the largest public universities in the U.S. do not track student suicides, according to recent findings from The Associated Press, despite efforts to improve mental health on campus.

Jennifer Brea was a PhD candidate at Harvard University when flu-like symptoms and a high fever brought her down for more than five years.

After her condition stumped several doctors, the 28-year-old filmed herself on her iPhone, including an episode when she was unable to move or speak. She showed the footage to her doctor, and in 2012 – a year and a half after her initial fever – she was diagnosed with a condition called myalgic encephalomyelitis, or chronic fatigue syndrome.

A severe shortage of inpatient care for people with mental illness is amounting to a public health crisis, as the number of individuals struggling with a range of psychiatric problems continues to rise.

Massachusetts Gov. Charlie Baker was expected to sign legislation on Monday that would cement in state law the Obama-era mandate for free birth control regardless of changes in federal policy or future repeal of the Affordable Care Act.

Three years into the water crisis in Flint, Mich., many residents still rely on bottled water, and experts say the ramifications are likely to continue for years to come.

The water crisis began in 2012, when Flint decided to switch the city's water source and failed to treat the water with an anti-corrosive. Water corroded the pipes, allowing lead to dissolve into the water. Even as the city replaces the tainted lines, the water remains unsafe to drink.

President Trump declared the opioid crisis a public health emergency on Thursday, freeing up resources to deal with the epidemic.

Last year, more than 64,000 people died from drug overdoses, according to the Centers for Disease Control and Prevention National Center for Health Statistics. Many of those overdoses were from heroin, prescription painkillers, fentanyl and other opioids.

Your child doesn't want to go to school. It's a daily struggle that many parents are familiar with.

But what if your child refuses to go to school?

Mental health professionals and educators say what used to be considered run-of-the-mill truancy could actually be something else. Some cases of chronic absenteeism are now being called "school refusal," which is triggered by anxiety, depression, family crises and other traumatic events. It can lead to weeks or even months of missed school days.