DMI - Drg Master File Information Segment

The Technical Steward for the DMI segment is Financial Management.

The DMI segment contains the DRG related basic information, for example, relative weight, etc. The DMI segment is used to send the fixed information assigned to a specific DRG.

HL7 Attribute Table - DMI - DRG Master File Information Segment

Seq#	Data Element Name	DataType	Usage	Vocabulary	Cardinality	Item #	Length	C.LEN	Flags
DMI
1	Diagnostic Related Group	CNE	O	0055 Diagnosis Related Group	[0..1]	00382
2	Major Diagnostic Category	CNE	C	0118 Major Diagnostic Category	[0..1]	00381
3	Lower and Upper Trim Points	NR	C		[0..1]	02231
4	Average Length of Stay	NM	C		[0..1]	02232		5	#
5	Relative Weight	NM	C		[0..1]	02233		7	#

DMI-1: Diagnostic Related Group (CNE) 00382

Definition: This field contains the DRG for the transaction. Interim DRG's could be determined for an encounter. Refer to External Table 0055 – Diagnosis Related Group in Chapter 2C, Code Tables, for suggested values.

DMI-2: Major Diagnostic Category (CNE) 00381

Definition: This field indicates the determined Major Diagnostic Category (MDC) value. Refer to External Table 0118 – Major Diagnostic Category in Chapter 2C, Code Tables, for suggested values.

DMI-3: Lower and Upper Trim Points (NR) 02231

Components: <Lower Trim Point (NM)> ^ <Upper Trim Point (NM)>

Definition: This field contains the lower and upper trim points as calculated for this DRG..

Example as used in Germany: The "lower trim point" is equivalent to 1/3 of the average length of stay for patients having this DRG. The "upper trim point" is equivalent to 3 times the average length of stay. It is marked as the right dotted line within the graphics below.

The following graphics provides an overview of the German usage:

The gray boxes represent the amount of cases according to the length of stay. The higher and lower 2,5% outliers (white boxes) are cut off. The average length of stay is calculated thereof and is represented by the middle dotted line. From that the lower trim point is calculated by dividing by 3, the upper trim point is the average multiplied with 3.

DMI-4: Average Length of Stay (NM) 02232

Definition: This field contains the average length of stay in days, calculated as the geometric mean value, allocated to the determined DRG.

DMI-5: Relative Weight (NM) 02233

Definition: Each DRG has its own relative weight (cost weight) which is calculated (defined) by official institutions. This value is the basis for calculating other values, e.g., the effective weight.