Aquiline Capital-backed National Medical Billing Services, a national medical billing services provider, completed the acquisition of National Billing Partners, a revenue cycle management company. Financial terms were not disclosed. "We are ecstatic to add NBP to the National Medical family as we continue to build scale in our core market. As a recognized leader in the ASC market, National Medical is highly discerning in adding partners with demonstrated success of providing significant value for its clients. NBP is no exception to this and brings additional expertise of serving surgical practices, an area of considerable growth opportunity for National Medical," Nader Samii, National Medical CEO.