Pay As Little As $0 With the Amgen First Step Program, eligible commercially insured patients may pay as little as $0 for their first dose of Mvasi. Each additional dose may be as little as $5. You Might Also Like Pay No More Than $10 Per Month May 21, 2018 $1 Coupon May 21, 2018 Pay As Little As $10 May 21, 2018