Kaiser's tax-exempt status challenged by union, Medi-Cal.
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Margolis
D002140:California; D002608:Charities; D006279:Health Maintenance Organizations / Q000191:economics* / Q000331:legislation & jurisprudence; D007750:Labor Unions; D008484:Medicaid; D008489:Medical Indigency; D009096:Multi-Institutional Systems / Q000331:legislation & jurisprudence / Q000458:organization & administration*; D009939:Organizations, Nonprofit / Q000191:economics* / Q000331:legislation & jurisprudence; D013221:State Health Plans; D013660:Taxes / Q000331:legislation & jurisprudence*; D014481:United States