LOINCActiveObservation

LOINC Code 64421-1: KIR gene allele 2DS2 Molgen Ql (Bld/Tiss)

64421-1 is a LOINC code used to identify KIR gene allele 2DS2 Molgen Ql (Bld/Tiss) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component KIR gene allele 2DS2. It is commonly used with the system or sample type Bld/Tiss.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component KIR gene allele 2DS2. It is commonly used with the system or sample type Bld/Tiss.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Observation
  • Method: Molgen

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • KIR gene allele 2DS2 [Presence] in Blood or Tissue by Molecular genetics method
  • KIR gene allele 2DS2
  • Blood; CD158E1; Killer cell Immunoglobulin-like Recptor; KIR; KIR 2DS2; KIR3DL1/S1; Molecular genetics; Molecular pathology; MOLPATH; NKAT3; NKAT-3; NKB1; NKB1B; Ordinal; PCR; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Tissue; Tissue, unspecified; WB; Whole blood; Whole blood or Tissue

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

KIR gene allele 2DS2 Molgen Ql (Bld/Tiss)KIR gene allele 2DS2 [Presence] in Blood or Tissue by Molecular genetics methodKIR 2DS2 Bld/T QlKIR gene allele 2DS2MOLPATHKIR gene allele 2DS2, Blood or tissue specimenPrThr

Frequently asked questions

Code details

Code64421-1
SystemLOINC
Display nameKIR gene allele 2DS2 Molgen Ql (Bld/Tiss)
DescriptionKIR gene allele 2DS2
Short nameKIR 2DS2 Bld/T Ql
ComponentKIR gene allele 2DS2
PropertyPrThr
TimingPt
System (specimen)Bld/Tiss
ScaleOrd
MethodMolgen
ClassMOLPATH
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.73

Consumer names

KIR gene allele 2DS2, Blood or tissue specimen

Part names

KIR gene allele 2DS2PrThrPtBld/TissOrdMolgenPresence or ThresholdPoint in time (spot)Blood or TissueMolecular genetics

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.