LOINCBoth

LOINC Code 45326-6: CMV IgG avidity [Ratio]

45326-6 is a LOINC code used to identify CMV IgG avidity [Ratio] 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 Cytomegalovirus Ab.IgG avidity. 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 Cytomegalovirus Ab.IgG avidity. 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: DISCOURAGED
  • Order vs observation: Both

What it does not mean

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

Key facts

  • Cytomegalovirus IgG Ab avidity [Ratio] in Serum or Plasma
  • Cytomegalovirus Ab.IgG avidity
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; CMV; Cytomegalo virus; Cytomgal; HHV-5; Human Herpesvirus-5; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; Microbiology; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Ratios; Rto; 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

CMV IgG avidity [Ratio]Cytomegalovirus IgG Ab avidity [Ratio] in Serum or PlasmaCMV IgG Avidity SerPl-RtoCytomegalovirus Ab.IgG avidityMICROCytomegalovirus (CMV) IgG avidity, BloodRatio

Frequently asked questions

Code details

Code45326-6
SystemLOINC
Display nameCMV IgG avidity [Ratio]
DescriptionCytomegalovirus Ab.IgG avidity
Short nameCMV IgG Avidity SerPl-Rto
ComponentCytomegalovirus Ab.IgG avidity
PropertyRatio
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassMICRO
StatusDISCOURAGED
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.17
Last changed2.73

Consumer names

Cytomegalovirus (CMV) IgG avidity, Blood

Part names

Cytomegalovirus Ab.IgG avidityRatioPtSer/PlasQnCytomegalovirus IgG AvidityPoint 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 45326-6 | HealthAssure