What Is Medicare Point Of Service? 
Medicare POS -LRB- point of service -RRB- plans have limited networks and if you want full coverage -LRB- without penalty -RRB- you should choose a par provider . Some POS plans require a referral which should minimize or eliminate any non-par penalties . Usually in a medical emergency situations the carrier will waive non-par penalties . Keep in mind you can still be balance billed by providers not in the POS network . 