NAME: Clinical Trial Number DESCRIPTION: The number used to identify all items and line item services provided to a beneficiary during their participation in a clinical trial. SHORT NAME: CCLTRNUM LONG NAME: CLM_CLNCL_TRIL_NUM TYPE: CHAR LENGTH: 8 SOURCE: - CODE VALUES: - COMMENT: CMS is requesting the clinical trial number be voluntarily reported. The number is assigned by the National Library of Medicine (NLM) Clinical Trials Data Bank when a new study is registered. Effective September 1, 2008 with the implementation of CR#3.