Insurance claim form developed by the National Uniform Billing Committee for hospital inpatient billing and payment transactions put into use by 2008. It replaces the Uniform Bill (UB-92) claim form. In the Medicare program, this is known as the CMS-1450 Medicare Uniform Institutional Provider Bill claim form . See CMS-1450 . For electronically transmitted institutional claims, the 837i replaces the paper UB-04.