Her husband runs a health clinic that has Medicaid patients. These Medicaid patients receive services and some of those services are covered by Medicaid. If it is covered by Medicaid then Medicaid pays the appropriate bills from government.funds to the health clinic. This is how every doctor and health clinic deals in the nation deals with with Medicaid.
source: http://bigjournalism.com/dloesch/2011/07/01/nbcs-bias-in-bachmann-medicaid-story/