LOINCActiveObservation

LOINC Code 101100-6: K little u Ag Ql (RBC)

101100-6 is a LOINC code used to identify K little u Ag Ql (RBC) 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 K little u Ag. It is commonly used with the system or sample type RBC.

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 K little u Ag. It is commonly used with the system or sample type RBC.

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

What it does not mean

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

Key facts

  • Ku Ag [Presence] on Red Blood Cells
  • K little u Ag
  • Antigen; Antigens; BLOOD BANK; Erythrocytes; Ku; Ku Ag; MNSs Blood Group System; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Red blood cells; Red blood corpusles; Screen

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

K little u Ag Ql (RBC)Ku Ag [Presence] on Red Blood CellsKu Ag RBC QlK little u AgBLDBKK little u antigen, Red blood cellsPrThr

Frequently asked questions

Code details

Code101100-6
SystemLOINC
Display nameK little u Ag Ql (RBC)
DescriptionK little u Ag
Short nameKu Ag RBC Ql
ComponentK little u Ag
PropertyPrThr
TimingPt
System (specimen)RBC
ScaleOrd
ClassBLDBK
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.74
Last changed2.75

Consumer names

K little u antigen, Red blood cells

Part names

K little u AgPrThrPtRBCOrdKu AgPresence or ThresholdPoint in time (spot)Red Blood Cells

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.

LOINC Code 101100-6 | HealthAssure