The April 1 enforcement deadline for using 5010 claim standards is fast approaching. "To ensure a smooth upgrade prior to April, you will need to complete both phase I internal and phase II external testing of Version 5010 transactions," CMS says in a message to providers. "As part of your external testing, you will need to conduct tests with outside trading partners, which include vendors, clearinghouses, billing services, and payers." You should be collaborating with your vendor and asking pointed questions about deadlines, cost, and training, CMS urges in the message posted to the HHH MAC websites as well. "Your vendor is a critical partner in achieving Version 5010 compliance," the agency stresses. Resource: You can attend a March 6 CMS webinar regarding the 5010 transition for more information. The agency will review top concerns about the transition, 5010 edits, and more. CMS will issue registration information soon, it says.