Sources:
1https://www.healthcarefinancenews.com/news/change-healthcare-analysis-shows-262-million-medical-claims-initially-denied-meaning-billions
2https://www.healthcare.gov/health-care-law-protections/rate-review/
3http://healthpayerintelligence.com/news/addressing-the-real-implications-of-social-determinants-of-health