LOINCActiveBoth

LOINC Code 104785-1: HBV core IgM Qn

104785-1 is a LOINC code used to identify HBV core IgM Qn 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 Hepatitis B virus core Ab.IgM. 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 Hepatitis B virus core Ab.IgM. 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

  • Hepatitis B virus core IgM Ab [Units/volume] in Serum or Plasma
  • Hepatitis B virus core Ab.IgM
  • A test for Hepatitis B virus core Ab.IgM in Ser/Plas via any immuno-assay method. A parent code for those with pre-coordinated immuno-assay methods.
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; anti-HBc; Arbitrary concentration; Autoantibodies; Autoantibody; HBc; HBV; HBV core; Hep; Hep B; Hepatis; Hepatit; Hepatitis Bc; HepB; Immune globulin M; Immunoglobulin M; Microbiology; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; 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

HBV core IgM QnHepatitis B virus core IgM Ab [Units/volume] in Serum or PlasmaHBV core IgM SerPl-aCncHepatitis B virus core Ab.IgMMICROHepatitis B virus (HBV) Core IgM antibody, BloodACnc

Frequently asked questions

Code details

Code104785-1
SystemLOINC
Display nameHBV core IgM Qn
DescriptionHepatitis B virus core Ab.IgM
Short nameHBV core IgM SerPl-aCnc
ComponentHepatitis B virus core Ab.IgM
PropertyACnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassMICRO
Example unitsarb U/mL
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.78
Last changed2.78

Consumer names

Hepatitis B virus (HBV) Core IgM antibody, Blood

Part names

Hepatitis B virus core Ab.IgMACncPtSer/PlasQnHepatitis B virus core IgMArbitrary ConcentrationPoint 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 104785-1 | HealthAssure