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LOINC Code 74420-1: Parvovirus B19 DNA NAA+probe Qn

74420-1 is a LOINC code used to identify Parvovirus B19 DNA NAA+probe 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 Parvovirus B19 DNA. It is commonly used with the system or sample type Ser/Plas.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Parvovirus B19 DNA. 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: Probe.amp.tar

What it does not mean

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

Key facts

  • Parvovirus B19 DNA [Units/volume] (viral load) in Serum or Plasma by NAA with probe detection
  • Parvovirus B19 DNA
  • 3 Self-Sustaining Sequence Replication; 3SR SR; Amplif; Amplification; Amplified; Arbitrary concentration; B19 virus; B19V; Deoxyribonucleic acid; DNA NUCLEIC ACID PROBE; DNA probe; Fifth Disease; ID; Infectious Disease; InfectiousDisease; LAT; LCR; Ligase chain reaction; Ligation-activated transcription; Microbiology; NAA+probe; NAAT; NASBA; Nucleic acid sequence based analysis; Parvo; Parvo virus; Parvov; PCR; Pl; Plasma; Plsm; Point in time; Polymerase chain reaction; Probe amp; Probe with ampification; Probe with target amplification; QBR; QNT; Quan; Quant; Quantitative; Random; SDA; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Strand Displacement Amplification; TMA; Transcription mediated amplification; Viral load

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

Parvovirus B19 DNA NAA+probe QnParvovirus B19 DNA [Units/volume] (viral load) in Serum or Plasma by NAA with probe detectionB19V DNA SerPl NAA+probe-aCncParvovirus B19 DNAMICROParvovirus B19, BloodACnc

Frequently asked questions

Code details

Code74420-1
SystemLOINC
Display nameParvovirus B19 DNA NAA+probe Qn
DescriptionParvovirus B19 DNA
Short nameB19V DNA SerPl NAA+probe-aCnc
ComponentParvovirus B19 DNA
PropertyACnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
MethodProbe.amp.tar
ClassMICRO
Example unitsIU/mL
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.46
Last changed2.73

Consumer names

Parvovirus B19, Blood

Part names

Parvovirus B19 DNAACncPtSer/PlasQnProbe.amp.tarArbitrary ConcentrationPoint in time (spot)Serum or PlasmaNucleic acid amplification with probe detection

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 74420-1 | HealthAssure