A Hospital Charged $1,877 to Pierce a 5-Year-Old’s Ears. This Is Why Health Care Costs So Much.

Correction, Dec. 4, 2017: A caption on the original story misidentified the image Christina Arenas was looking at on her computer screen. The caption said it was a mammogram, but it is an ultrasound.

Correction, Dec. 4, 2017: An earlier version of this article omitted the Medicare tax in calculating the top tax rate on earned income.

Cheap Tricks: The Low Cost of Internet Harassment

Correction, Nov. 13, 2017: This article has been updated to correct the description of how the email sender GetResponse learned about the email attacks on ProPublica. GetResponse noticed the attacks without using the industry's new technical header.

The White House Says It Doesn’t Keep a List of Mar-a-Lago Visitors. Experts and Visitors Are Skeptical.

Correction, Oct. 16, 2017: A previous version of this story mistakenly referred to the Center for Responsibility and Ethics in Washington. The nonprofit organization is called Citizens for Responsibility and Ethics in Washington.

Who’s Really in Charge of the Voting Fraud Commission?

Correction, Oct. 6, 2017: The court that blocked Texas’s release of voter data was a state court, not a federal court as we originally reported. In addition, we originally identified the plaintiff in the lawsuit that resulted in the release of email metadata as the Campaign Legal Center. It is the Lawyers Committee for Civil Rights Under Law.

Why Do Border Deaths Persist When the Number of Border Crossings Is Falling?

Correction, Sept. 22, 2017: This story originally said Daniel Martinez is an associate professor. He is an assistant professor.

The Trumps Say They’re Opening Hotels in Dallas, Nashville and Elsewhere. We Couldn’t Find Evidence of Them.

Correction, Sept. 19, 2017: An earlier version of this story incorrectly described Turning Point USA. It is a nonprofit group that promotes conservative politics, not a political action committee, or PAC.

Amid Opioid Crisis, Insurers Restrict Pricey, Less Addictive Painkillers

Correction, Sept. 18, 2017: A prior version of this story misstated the source of research done on opioid use. The study was conducted by researchers at the University of Arkansas for Medical Sciences and published by the Centers for Disease Control and Prevention; it was not done by the CDC.

Houston Officials Hope Harvey Convinces Congress to Fund Coastal Barrier

Correction, Sept. 13, 2017: A previous version of this story listed U.S. Sen. John Cornyn as one of the officials who signed a letter to President Trump urging federal funding of the coastal spine. Cornyn supports the project but did not sign that letter.

Another Thing Disappearing From Rural America: Maternal Care

Correction, Feb. 26. 2018: Because of an error by researchers, this story previously misstated the number of reproductive-age women in rural America. The correct number is 18 million, not 28 million.

Pro-Russian Bots Take Up the Right-Wing Cause After Charlottesville

Correction, Aug. 25, 2017: An earlier version of this article mischaracterized the composition of the 600 accounts tracked by the Alliance for Securing Democracy. The sample includes openly pro-Russian accounts that push content from RT and Sputnik, but RT and Sputnik are not themselves in the sample.

‘If You Hemorrhage, Don’t Clean Up’: Advice From Mothers Who Almost Died

Correction, August 4, 2017: This article incorrectly attributed a quote to Kristy Kummer-Pred. It has been deleted.

Dangerous Pollutants in Military’s Open Burns Greater Than Thought, Tests Indicate

Correction, August 16, 2017: An earlier version of this article mistakenly described the acetone detected in air samples in Radford as cancer-causing. Acetone is not believed to be a human carcinogen.

The Breakthrough: How an ICIJ Reporter Dug Up the World Bank’s Best Kept Secret

Correction, July 18, 2017: We have updated this piece to reflect a more specific characterization of the treatment of the 3.4 million people impacted by World Bank projects.

Trump’s Russia Lawyer Isn’t Seeking Security Clearance, And May Have Trouble Getting One

Correction, July 12, 2017: This story previously said former senator Joseph Lieberman grew up in New Haven, Connecticut. In fact, he grew up in Stamford, Connecticut.

Drugmakers’ Money-Back Guarantees: an Answer to Rising Prices or a ‘Carnival Game’

Correction, July 10, 2017: An earlier version of this article referred incorrectly to deals between drugmakers and health plans for coverage of drugs like Repatha. The deals made it easier for patients to gain access to Repatha through their insurer; they did not ease restrictions on which patients were prescribed the drug.

Despite Exposés and Embarrassments, Hundreds of Judges Preside in New York Without Law Degrees

Correction, June 27, 2017: A dropped word in a previous version of this article resulted in an understatement of the number of disciplinary actions taken by the New York State Commission on Judicial Conduct against town and village judges. Such judges were the subject of sanctions in 70 percent of all cases resulting in discipline over the course of the commission’s existence, not in just 70 cases.

A Drug Quintupled in Price. Now, Drug Industry Players Are Feuding Over the Windfall.

Correction, May 31, 2017: An earlier version of this article quoted Brian Henry, a spokesman for Express Scripts, as saying that all administrative fees are passed back to plans in the Medicare program. After the article was published, Henry indicated that he misspoke and should have said that the “vast majority” of such fees were passed along to Medicare plans.

Prosecutors Race to Keep Notorious Angel-of-Death Behind Bars

Correction, May 26, 2017: Dilantin, which was described in a previous version of this article as a sedative drug, is an anti-seizure drug though it does have sedative properties.

What We’ve Learned So Far About Maternal Mortality From You, Our Readers

Correction, May 18, 2017: This story has been corrected to reflect that Lauren Bloomstein died after giving birth to a daughter, not a son.

Trump’s Expected Pick for Top USDA Scientist Is Not a Scientist

Correction, May 13, 2017: This piece originally indicated the Global Research Alliance to Reduce Agricultural Greenhouse Gases was part of the G20. It is a separate effort.

Correction, May 17, 2017: We originally identified the university Clovis received his MBA from as Golden State University — it was Golden Gate University.

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