HMO community rating by class: employers and HMOs need to collect health status information.
D000206:Actuarial Analysis; D000367:Age Factors; D006264:Health Benefit Plans, Employee / Q000191:economics*; D006279:Health Maintenance Organizations / Q000191:economics*; D006801:Humans; D007348:Insurance, Health / Q000191:economics*; D008962:Models, Theoretical; D011907:Rate Setting and Review / Q000331:legislation & jurisprudence*; D012737:Sex Factors; D014481:United States