I think the pressure needs to be placed on Medicaid to stop funding it. It's my understanding that the private sector insurance tends to follow the government sector in regards to health insurance.
I think an additional push - and a hugely important one - will be law suits in the private sector. The sad case of baby Mario Delgato in Florida is one to watch. (For those who are not familiar, the baby was circumcised against the mother's written and multiple verbal instructions that he was NOT to be circumcised. He spent 10 days in the NICU and on day 8, when mom went home to take a shower, he was taken from the NICU and circumcised. The hospital is claiming a misreading of the consent form. She is persuing legal action on the grounds of battery.)
Also, the boys who were circumcised after the signing of the federal law banning any form of genital cutting on minor females will be reaching legal age in about 5 years. Those young men will have a window of time (a few years depending upon the statute of limitations for their state) to seek legal action on the grounds of lack of equal protection under the law. I think the legal areana might get interesting. I hope to live long enough to see this issue before the US Supreme Court. I don't think the political climate is ready for it yet.
Right now, I think the most effective place of action is with individual parents. The medical community is far far away from ceasing to solicit circumcision but educated parents do refuse their offers. The intactivist efforts to educate individuals are very important.