Regional PPO network responds to market opportunity.
D016363:Antitrust Laws; D019058:Community Networks / Q000191:economics / Q000458:organization & administration*; D003284:Contract Services; D003657:Decision Making; D004465:Economic Competition; D017146:Models, Organizational; D009519:New York City; D010820:Physicians; D011243:Preferred Provider Organizations / Q000191:economics / Q000458:organization & administration*; D015895:Relative Value Scales