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This variable is contained in the following files: Carrier (Fee-for-Service), Durable Medical Equipment (Fee-for-Service)
Short SAS Name
SAS Name

The number used to identify all items and line item services provided to a beneficiary during their participation in a clinical trial.


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.

Source: NCH