NUBC Resources UB-04 Change Implementation Calendar ACA - Operating Rules and CORE Form Locator 4 - Type of Bill Frequency Code Excerpts for 837p and 837d AHA Central Office on ICD-10-CM/ICD-10-PCS/HCPCS Order UB-04 Forms: Amazon Quill FileRx National Uniform Billing Committee (NUBC)/UB-04
