Recommendation:

To identify the requested observation/test/battery LOINC should be used as the standard coding system.

Alternative 1:

The SNOMED CT expression associated with a LOINC code may be used.

Alternative 2:

SNOMED CT concepts from the or hierarchies may be used.

Examples

Example 1: Value set for Lab Test orderables that could be used for influenza

Value Set Code PHVS_LabTestOrder_PHLIP_Flu

Concept Code

Preferred Concept Name

Code System Name

68991-9

Epidemiologically important information for public health reporting panel

LOINC

29591-5

Enterovirus RNA [Presence] in Unspecified specimen by Probe & target amplification method

LOINC

60528-7

Enterovirus subtype [Type] in Unspecified specimen by Probe & target amplification method

LOINC

5843-8

EV XXX cult

LOINC

43364-9

Enterovirus identified in Unspecified specimen by Immunofluorescence

LOINC

5229-0

Influenza Virus A (Ab) CF Titer

LOINC

5230-8

Influenza Virus B (Ab) CF Titer

LOINC

6604-3

Influenza Virus Culture for Isolation on XXX

LOINC

6437-8

Influenza Virus A+B EIA on XXX

LOINC

5862-8

Influenza Virus A EIA on XXX

LOINC

https://phinvads.cdc.gov/vads/ViewValueSet.action?id=2EFBC056-83A9-E311-8D07-0017A477041A#

Example 2: Laboratory Orders in National Animal Health Laboratory Network

The NAHLN uses LOINC codes to defining the test or panel/battery ordered as the Universal Service Identifier (OBR-4). In the NAHLN, new tests or panels that do not have an assigned LOINC Code, are identified with an alternative or local identifier.

Subset of Test Codes in National Animal Health Laboratory Network

CODE

CODINGSYSTEM

TEXT

44273-1

LN

CSFV RNA XXX PCR-aCnc

10739-1

LN

Virus XXX EM

15444-3

LN

FLUA Ab Ser Ql ID

15448-4

LN

APMV1 Ab Titr Ser HAI

22822-1

LN

FLUA Ab Ser Ql EIA

22826-2

LN

FLUA XXX Bioassay

22832-0

LN

APMV1 XXX Bioassay

23002-9

LN

CSFV Ab Ser Ql EIA

23006-0

LN

CSFV Ag XXX Ql IF

23007-8

LN

CSFV Ag Tiss Ql ImStn

23108-4

LN

FMDV Ab Ser Ql EIA

23109-2

LN

FMDV Ab Ser Ql ID

23115-9

LN

FMDV Sertyp XXX CF

23120-9

LN

FMDV Sertyp XXX EIA

23121-7

LN

FMDV Sertyp Tissue PCR

23379-1

LN

Abn Prion Prot Brain Ql IB

23380-9

LN

Abn Prion Prot Brain Ql ImStn

23563-0

LN

VSIV Ab Ser Ql EIA

http://vtsl.vetmed.vt.edu/nahln/main.cfm?page=subset&subset=observation_id