LOINCActiveBoth

LOINC Code 44755-7: HDV Ag IA Qn (S)

44755-7 is a LOINC code used to identify HDV Ag IA Qn (S) 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 D virus Ag. It is commonly used with the system or sample type Ser.

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 D virus Ag. It is commonly used with the system or sample type Ser.

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 D virus Ag [Units/volume] in Serum by Immunoassay
  • Hepatitis D virus Ag
  • Antigen; Antigens; Arbitrary concentration; Delta hepatitis; Dextro; EIA; ELFA; ELISA; Enzyme immunoassay; HDV; Hep; Hep D; Hep Delta; Hepatis; Hepatit; Hepatitis delta virus; IAA; ID; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; 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

HDV Ag IA Qn (S)Hepatitis D virus Ag [Units/volume] in Serum by ImmunoassayHDV Ag Ser IA-aCncHepatitis D virus AgMICROHDV antigen, BloodACnc

Frequently asked questions

Code details

Code44755-7
SystemLOINC
Display nameHDV Ag IA Qn (S)
DescriptionHepatitis D virus Ag
Short nameHDV Ag Ser IA-aCnc
ComponentHepatitis D virus Ag
PropertyACnc
TimingPt
System (specimen)Ser
ScaleQn
MethodIA
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

HDV antigen, Blood

Part names

Hepatitis D virus AgACncPtSerQnIAArbitrary ConcentrationPoint in time (spot)SerumImmunoassay

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 44755-7 | HealthAssure