AmSurg is the largest single-specialty outpatient company in the United States, operating 170 ASC centers across the nation. None of their centers are branded as AmSurg, because all marketing efforts have been geared toward acquiring physician partners in locally branded outpatient centers. AmSurg GI centers are leaders in the specialty and perform more than 700,000 colonoscopies annually. A sub-brand was created for use by the GI centers as The Colon Cancer Prevention Network. A multi-media campaign raised the awareness of colon cancer as a killer and educated persons over 45 on the importance of having a colonoscopy.