LOINCActiveBoth

LOINC Code 5196-1: HBV surface Ag IA Ql

5196-1 is a LOINC code used to identify HBV surface Ag 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 Hepatitis B virus surface Ag. 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 surface Ag. 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

Hepatitis B virus surface Ag [Presence] in Serum or Plasma by Immunoassay
Hepatitis B virus surface Ag
Current (2011) HBV S Ag tests require confirmatory testing when positive (see [LOINC65633-0] for new confirm test).
Antigen; Antigens; Australia antigen; EIA; ELFA; ELISA; Enzyme immunoassay; HBs; HBsAG; HBV; HBV surface; Hep; Hep B; Hep Bs; Hepatis; Hepatit; Hepatology; HepB; IAA; ID; Infectious Disease; InfectiousDisease; Liver; MEIA; Microbiology; Ordinal; Pl; Plasma; Plsm; Point in time; PR; QL; Qual; Qualitative; Random; Screen; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; SUDS; Surf; UniversalLabOrders

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 surface Ag IA QlHepatitis B virus surface Ag [Presence] in Serum or Plasma by ImmunoassayHBV surface Ag SerPl Ql IAHepatitis B virus surface AgMICROHepatitis B virus (HBV) Surface antigen, BloodPrThr

Frequently asked questions

Code details

Code5196-1
SystemLOINC
Display nameHBV surface Ag IA Ql
DescriptionHepatitis B virus surface Ag
Short nameHBV surface Ag SerPl Ql IA
ComponentHepatitis B virus surface Ag
PropertyPrThr
TimingPt
System (specimen)Ser/Plas
ScaleOrd
MethodIA
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.73

Consumer names

Hepatitis B virus (HBV) Surface antigen, Blood

Part names

Hepatitis B virus surface AgPrThrPtSer/PlasOrdIAPresence 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 5196-1 | HealthAssure