Under the program, her Celebrex would have cost $648 per month until she fulfilled her $1,500 prescription deductible, followed by an $85 regular co-pay. Mason is among the many Us citizens with serious ailments -; including cancer, multiple sclerosis and rheumatoid arthritis -; who are indeed locating relatively low regular premiums under President Barack Obama's laws. But some have been shocked at just how much their prescriptions are costing as insurers are sorting drug prices into a complex tier system and in some cases charging co-insurance rates as high as 50 %. That may leave individuals on the hook for thousands . Reuters: U.S.gov, allows people to enroll after March 31 if they had tried earlier and were prevented by system problems including technical glitches .S.