A few of the recent pieces I've liked:
The excellent "Unequal Risk" series by the Center for Public Integrity's Jim Morris, Jamie Smith Hopkins, and Maryam Jameel ("Workers in America face risks from toxic exposures that would be considered unacceptable outside the job — and in many cases are perfectly legal.")
Sarah Kliff at Vox: Do no harm ("There's an infection hospitals can nearly always prevent. Why don't they?")
Ta-Nehisi Coates in The Atlantic: Letter to My Son ("Here is what I would like for you to know: In America, it is traditional to destroy the black body -- it is heritage.")
Charles Ornstein at ProPublica: Transparency Program Obscures Pharma Payments to Nurses, Physician Assistants
Anna Diamond at Slate: The EACH Woman Act is Reasonable, Necessary, and Doesn't Have Much of a Chance
And if you haven't seen it, Maryn McKenna's TED Talk "What do we do when antibiotics don't work anymore?" is well worth checking out.