From HCA's web page:
This unique program offers either $75,000 or $100,000 in health insurance coverage every year. Members maintain low deductibles and, at times, no-cost coverage for basic health services. This provides coverage for those unexpected trips to the hospital. In most cases, $75,000 or $100,000 is plenty of coverage throughout the year.You can estimate your premium here.
See here for more details about the program.