ERISA-based defense can shield HMOs from costly suits.
D000368:Aged; D006264:Health Benefit Plans, Employee / Q000331:legislation & jurisprudence*; D006279:Health Maintenance Organizations / Q000331:legislation & jurisprudence*; D006801:Humans; D007345:Insurance Claim Review / Q000331:legislation & jurisprudence*; D007348:Insurance, Health / Q000331:legislation & jurisprudence*; D012179:Retirement; D014481:United States