LOINCActiveBoth

LOINC Code 80612-5: B IgG Ql

80612-5 is a LOINC code used to identify B IgG Ql 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 B Ab.IgG. It is commonly used with the system or sample type Ser/Plas.

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 B Ab.IgG. It is commonly used with the system or sample type Ser/Plas.

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: Both

What it does not mean

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

Key facts

B IgG Ab [Presence] in Serum or Plasma
B Ab.IgG
Used to identify blood group A IgG antibodies in newborns that have a positive direct antiglobulin test (DAT). Hemolytic disease of the newborn (HDN) caused by ABO antibodies occurs almost exclusively in infants of blood group A or B who are born to group O mothers because the anti-A and anti-B formed in group O individuals tend to be of the IgG type. [PMID8021795]
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; BLOOD BANK; Immune globulin G; Immunoglobulin G; Ordinal; Pl; Plasma; Plsm; Point in time; PR; QL; Qual; Qualitative; Random; Screen; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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

B IgG QlB IgG Ab [Presence] in Serum or PlasmaB IgG SerPl QlB Ab.IgGBLDBKB IgG antibody, BloodPrThr

Frequently asked questions

Code details

Code80612-5
SystemLOINC
Display nameB IgG Ql
DescriptionB Ab.IgG
Short nameB IgG SerPl Ql
ComponentB Ab.IgG
PropertyPrThr
TimingPt
System (specimen)Ser/Plas
ScaleOrd
ClassBLDBK
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.56
Last changed2.56

Consumer names

B IgG antibody, Blood

Part names

B Ab.IgGPrThrPtSer/PlasOrdB IgGPresence or ThresholdPoint in time (spot)Serum or Plasma

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 80612-5 | HealthAssure