CM1 - Clinical Study Phase Master Segment

The Technical Steward for the CM1 segment is Orders and Observations.

Each Clinical Study Phase Master (CM1) segment contains the information about one phase of a study identified in the preceding CM0. This is an optional structure to be used if the study has more than one treatment or evaluation phase within it. The identification of study phases that the patient enters are sent in the CSP segment: sequence 2. The CM1 segment describes the phase in general for the receiving system.

HL7 Attribute Table - CM1 - Clinical Study Phase Master Segment

Seq#	Data Element Name	DataType	Usage	Vocabulary	Cardinality	Item #	Length	C.LEN	Flags
CM1
1	Set ID - CM1	SI	R		[1..1]	01021	[1..4]
2	Study Phase Identifier	CWE	R	0587	[1..1]	01022
3	Description of Study Phase	ST	R		[1..1]	01023		300	#

CM1-1: Set ID - CM1 (SI) 01021

Definition: This field contains a number that uniquely identifies this transaction for the purpose of adding, changing, or deleting the transaction. For those messages that permit segments to repeat, the Set IF field is used to identify the repetitions.

CM1-2: Study Phase Identifier (CWE) 01022

Definition: This field should correspond to the study phase ID coding system in Chapter 7, section 7.7.2.1, "Study Phase ID."

CM1-3: Description of Study Phase (ST) 01023

Definition: This field contains a brief explanation for recipients to understand what the phase represents.