Health plan networks: a new delivery option.
D003363:Cost Control / Q000379:methods*; D006123:Group Practice / Q000191:economics*; D006125:Group Practice, Prepaid / Q000191:economics*; D006279:Health Maintenance Organizations / Q000191:economics*; D007348:Insurance, Health / Q000191:economics*; D008396:Maryland; D011243:Preferred Provider Organizations / Q000191:economics*