What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 971-2: Weak D Ag Ql (RBC donor)

Name: LOINC Code 971-2: Weak D Ag Ql (RBC donor)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:29.655Z

971-2 is a LOINC code used to identify Weak D Ag Ql (RBC donor) 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 Weak D Ag. It is commonly used with the system or sample type RBC^Donor.

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 Weak D Ag. It is commonly used with the system or sample type RBC^Donor.

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

Weak D Ag [Presence] on Red Blood Cells from Donor
Weak D Ag
Antigen; Antigens; BLOOD BANK; Dextro; Donr; Erythrocytes; Hematology; Heme; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Red blood cells; Red blood corpusles; Rh; Rhesus; 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

Weak D Ag Ql (RBC donor)Weak D Ag [Presence] on Red Blood Cells from DonorWeak D Ag RBC Donr QlWeak D AgBLDBKWeak D antigen, Donor Red blood cellsPrThr

Frequently asked questions

Code details

Code971-2

SystemLOINC

Display nameWeak D Ag Ql (RBC donor)

DescriptionWeak D Ag

Short nameWeak D Ag RBC Donr Ql

ComponentWeak D Ag

PropertyPrThr

TimingPt

System (specimen)RBC^Donor

ScaleOrd

ClassBLDBK

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.70

Consumer names

Weak D antigen, Donor Red blood cells

Part names

Weak D AgPrThrPtRBC^DonorOrdPresence or ThresholdPoint in time (spot)Red Blood Cells^Donor

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.