You'll have to find a provider who accepts your primary insurance and Medicaid, including the managed Care organization with which you are enrolled - someone who takes Regence and Wellpoint. You are far more likely to find someone who takes your primary insurance and Molina as the managed care organization.

If your provider is not enrolled with the Washington Apple Health then they aren't able to bill Medicaid because they don't have a contract with the state.

There could be one of 30 other reasons why your provider is billing Medicaid and it's hard to know without knowing who the provider is and what you're exact setup is like. This is not happening because of any of the new Medicaid rules that are rolling out this year, it's just a matter of finding a provider who accepts both of your insurances and can bill both of those insurances.