title: Opinion mixed on effect of any willing provider decision.
mesh_terms: D002204:Capitation Fee; D006123:Group Practice / Q000191:economics / Q000331:legislation & jurisprudence / Q000458:organization & administration; D019981:Health Care Sector; D006279:Health Maintenance Organizations / Q000191:economics / Q000331:legislation & jurisprudence* / Q000458:organization & administration; D020403:Patient Freedom of Choice Laws; D012051:Reimbursement Mechanisms / Q000331:legislation & jurisprudence*; D014481:United States