The website ProPublica covers policy topics each week. In a lengthy March 25 article by Rucker et al., they cover denial issues at a major payor, using "internal documents and former company executives."
https://www.propublica.org/article/cigna-pxdx-medical-health-insurance-rejection-claims
The article is paired with a webinar on March 28, Tuesday at 2 ET. I don't know if the video will be archived or not. The webinar page is here:
