This past February, a ransomware attack on a company called Change Healthcare brought medical billing in the United States to a standstill and propelled hundreds of financially strapped health systems and medical practices to the brink of bankruptcy. The breach paralyzed the cash flow of many of the organizations that collectively account for a fifth of the U.S. economy, potentially compromised as many as 85 million patient records, and cost billions of dollars. Recovery is still in progress as we write, and it may be months or years before the final toll is known.