CTI - Clinical Trial Identification Segment

The CTI segment is an optional segment that contains information to identify the clinical trial, phase and time point with which an order or result is associated.

HL7 Attribute Table - CTI - Clinical Trial Identification Segment

Seq#	Data Element Name	DataType	Usage	Vocabulary	Cardinality	Item #	Length	C.LEN	Flags
CTI
1	Sponsor Study ID	EI	R		[1..1]	01011
2	Study Phase Identifier	CWE	C	0587	[0..1]	01022
3	Study Scheduled Time Point	CWE	O	0595	[0..1]	01055
4	Action Code	ID	O	0206(R) Segment Action Code(Required)	[0..1]	00816	[2..2]

CTI-1: Sponsor Study ID (EI) 01011

Definition: This field contains the universal identifier for the clinical trial. The coding system is as described in CSR-1 Sponsor Study ID.

CTI-2: Study Phase Identifier (CWE) 01022

Definition: This field identifies the phase of the study that a patient has entered. See CSP-1 Study Phase Identifier for details of coding systems. Refer to Table 0597 - Study Phase Identifier in Chapter 2C for valid values.

CTI-3: Study Scheduled Time Point (CWE) 01055

Definition: This field identifies a time point in the clinical trial phase. CTI-2 Study Phase Identifier must be valued if CTI-3 Study Scheduled Time Point is valued. Should correspond to CSS-1 Study Scheduled Time Point. Refer to Table 0598 - Study Scheduled Time Point in Chapter 2C for valid values.

CTI-4: Action Code (ID) 00816

Definition: This field reveals the intent of the message. Refer to HL7 Table 0206 - Segment Action Code for valid values.

The action code can only be used when CTI-1 is valued in accordance with the guidance in Chapter 2, Section 2.10.4.2.