CMS is instructing Medicare providers and suppliers that the updated version of the Medicare claim form (CMS 1500 form version 02/12) must be used for all Medicare paper claims received on and after April 1, 2014. The new form includes indicators to differentiate between ICD-9 and ICD-10 codes, identifies whether certain providers have performed an ordering, referring, or supervising role in the furnishing of the service, and expands the number of possible diagnosis codes on a claim to 12, among other changes. The old version of the Medicare claims form, version 08/05, will only be accepted through March 31, 2014.