The 'S' at the end of HTTPS stands for 'Secure'.  It means that all communication between the browser (the customer) and the website (the business) are encrypted.

Cigna Transparency in Coverage This link leads to the machine-readable files that are made available in response to the federal Transparency in Coverage Rule and includes negotiated service rates and out-of-network allowed amounts between health plans and healthcare providers. The machine readable files are formatted to allow researchers, regulators, and application developers to more easily access and analyze data.