This website is temporarily out of service due to system maintenance. About PECOSPECOS is the application that supports the Medicare provider and supplier enrollment process by capturing provider/supplier information from the 855A, 855B, 855I, 855O, 855R and 855S forms. For information pertaining to Medicare and to Medicare provider enrollment and certification, please access the following website: https://www.cms.gov/Medicare/Medicare.html For general information pertaining to the Department of Health and Human Services, please access the following website: http://www.hhs.gov/
