Is this what you are talking about? I'm not familiar with it but I did find this information.
QMB Provider Certification for Title 19
The QMB program will pay the 20% Medicare Part B co-insurance only if the provider of services is certified as a Medicaid provider.
Note, however, a provider may choose to treat only QMB patients and not all Medicaid recipients and only the QMB patients he chooses to see. Providers have no obligation to treat Medicaid patients or anyone in particular.
Physicians and other Part B providers may become Medicaid certified by calling the State Medicaid contractor, EDS, at (860) 832-9259. EDS will send a provider enrollment package. The provider only has to fill out a form in order to become Medicaid certified. DSS also has a Medicaid provider relations department.