LOINCActiveBoth

LOINC Code 72318-9: Centromere protein A IgG IA Ql

72318-9 is a LOINC code used to identify Centromere protein A IgG IA 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 Centromere protein A 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 Centromere protein A 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
  • Method: IA

What it does not mean

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

Key facts

  • Centromere protein A IgG Ab [Presence] in Serum or Plasma by Immunoassay
  • Centromere protein A Ab.IgG
  • Centromere protein A (CENP-A) IgG class autoantibodies can be detected by enzyme immunoassays. Results may be interpreted by humans or automated methods and used for the diagnosis of system sclerosis (SSc, diffuse and limited forms) and overlapping syndromes. This code was created for, but not limited to, the detection of CENP-A autoantibodies in Euroimmun's Systemic Sclerosis (Nucleoli) Profile EUROLINE (IgG) test kit.
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Cen; CENP A; CENPA; Centromere A Ab; CRST syndrome; EIA; ELFA; ELISA; Enzyme immunoassay; Histone H3-like centromeric protein A; IAA; Immune globulin G; Immunoglobulin G; MEIA; Ordinal; Pl; Plasma; Plsm; Point in time; PR; Prot; QL; Qual; Qualitative; Random; Screen; Serology; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; SUDS

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

Centromere protein A IgG IA QlCentromere protein A IgG Ab [Presence] in Serum or Plasma by ImmunoassayCENP A IgG SerPl Ql IACentromere protein A Ab.IgGSEROCentromere Protein A IgG antibody, BloodPrThr

Frequently asked questions

Code details

Code72318-9
SystemLOINC
Display nameCentromere protein A IgG IA Ql
DescriptionCentromere protein A Ab.IgG
Short nameCENP A IgG SerPl Ql IA
ComponentCentromere protein A Ab.IgG
PropertyPrThr
TimingPt
System (specimen)Ser/Plas
ScaleOrd
MethodIA
ClassSERO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.42
Last changed2.56

Consumer names

Centromere Protein A IgG antibody, Blood

Part names

Centromere protein A Ab.IgGPrThrPtSer/PlasOrdIACentromere protein A IgGPresence or ThresholdPoint in time (spot)Serum or PlasmaImmunoassay

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 72318-9 | HealthAssure