Clipping doctors from referral program spurs them to clip costs.
D003363:Cost Control / Q000379:methods; D006296:Health Services / Q000191:economics*; D006300:Health Services Misuse / Q000191:economics*; D008505:Medical Staff, Hospital / Q000191:economics*; D011445:Prospective Payment System; D012017:Referral and Consultation / Q000191:economics*; D014481:United States