Previous Page TOC Index Next Page

8.7.5 OM3 - categorical test/observation segment

This segment applies to free text and other non-numeric data types.

Figure 8-9. OM3 attributes

SEQ

LEN

DT

OPT

RP/#

TBL#

ITEM#

ELEMENT NAME

1

4

NM

O



00586

Sequence Number

2

60

CE

O



00636

Preferred Coding System

3

60

CE

O



00637

Valid Coded "Answers"

4

200

CE

O

Y


00638

Normal Text/Codes for Categorical Observations

5

200

CE

O



00639

Abnormal Text/Codes for Categorical Observations

6

200

CE

O



00640

Critical Text Codes for Categorical Observations

7

3

ID

O


0125

00570

Value Type

8.7.5.0 OM3 field definitions

8.7.5.1 Sequence number (NM) 00586

Definition: This field contains the same value as the sequence number of the associated OM1 segment.

8.7.5.2 Preferred coding system (CE) 00636

Components: <identifier (ST)> ^ <text (ST)> ^ <name of coding system (ST)> ^ <alternate identifier (ST)> ^ <alternate text (ST)> ^ <name of alternate coding system (ST)>

Definition: This field contains the observations whose categorical responses are taken from a specified table of codes (e.g., CE data types). Record the preferred coding system for this observation (e.g., ICD9, SNOMED III). Take the codes from ASTM Table 3 or 5, or specify a local code.

8.7.5.3 Valid coded "answers" (CE) 00637

Components: <identifier (ST)> ^ <text (ST)> ^ <name of coding system (ST)> ^ <alternate identifier (ST)> ^ <alternate text (ST)> ^ <name of alternate coding system (ST)>

Definition: This field contains a list of valid coded answers. In the case that the list of coded answers is easily enumerated, list the valid coded answers for this observation here using the preferred coding system given in OM3-2-preferred coding system. If, for example, the given observation was VDRL, the valid answers might be non-reactive, 86^ intermediate, and 87^ reactive.

8.7.5.4 Normal text/codes for categorical observations (CE) 00638

Components: <identifier (ST)> ^ <text (ST)> ^ <name of coding system (ST)> ^ <alternate identifier (ST)> ^ <alternate text (ST)> ^ <name of alternate coding system (ST)>

Definition: Certain observations/tests with a nature code of A or C (see OM1-18-nature of test/observation) have text (alpha) results (e.g., reactive, nonreactive). Alpha normals for those tests should be entered in this field (e.g., "nonreactive").

The format of this field is:

The first component is a code taken from a standard code source list. The second component is the text associated with the code. The third component is the identification of the code table source. When only a text description of a possible answer is available, it is recorded as ^<text>.

Care should be taken to transmit only those results that are considered normal for that test. A drug screen may have possible results of "negative" and "positive." However, only a result of "negative" is considered to be normal. When an observation has more than one "normal" result, multiple values in this field should be separated with a repeat delimiter.

8.7.5.5 Abnormal text/codes for categorical observations (CE) 00639

Components: <identifier (ST)> ^ <text (ST)> ^ <name of coding system (ST)> ^ <alternate identifier (ST)> ^ <alternate text (ST)> ^ <name of alternate coding system (ST)>

Definition: This field contains the list of the text answers that are abnormal for the test.

8.7.5.6 Critical abnormal text/codes for categorical observations (CE) 00640

Components: <identifier (ST)> ^ <text (ST)> ^ <name of coding system (ST)> ^ <alternate identifier (ST)> ^ <alternate text (ST)> ^ <name of alternate coding system (ST)>

Definition: This field contains the list of coded results that are critically abnormal for this observation.

8.7.5.7 Value type (ID) 00570

Definition: This field contains the allowed data type for a single categorical observation (code A or C in OM1-18-nature of observation). Refer to HL7 table - 0125 - Value type for valid values.

Previous Page TOC Index Next Page