The Centers for Medicare & Medicaid Services (CMS) is soliciting nominations for new members to the Advisory Panel on Hospital Outpatient Payment to fill five current vacancies. The Panel is charged with advising the HHS Secretary and the CMS Administrator on the clinical integrity of the Medicare hospital outpatient Ambulatory Payment Classification groups and their associated weights, along with supervision levels for hospital outpatient services. CMS will consider nominations received by December 31, 2013.