LOINCActiveBoth

LOINC Code 42003-4: HCV RNA Probe+sig amp [Log #/Vol]

42003-4 is a LOINC code used to identify HCV RNA Probe+sig amp [Log #/Vol] 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 C virus RNA. 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 C virus RNA. 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.sig

What it does not mean

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

Key facts

  • Hepatitis C virus RNA [Log #/volume] (viral load) in Serum or Plasma by Probe with signal amplification
  • Hepatitis C virus RNA
  • Amplif; Amplification; Amplified; bDNA; Bdn-A; Branched Chain DNA; DNA NUCLEIC ACID PROBE; DNA probe; HC; HCV; Hep; Hep C; Hepatis; Hepatit; Hepatology; HPA; Hybidization Protection Assay; Hybrid Capture; Hybrid Capture nucleic acid hybridization; ID; Infectious Disease; InfectiousDisease; Liver; Log NCNC; Log#; Microbiology; Pl; Plasma; Plsm; Point in time; Probe amp; Probe with ampification; Probe with signal amplification; Probe+sig amp; QNT; Quan; Quant; Quantitative; Random; Ribonucleic acid; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; 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

HCV RNA Probe+sig amp [Log #/Vol]Hepatitis C virus RNA [Log #/volume] (viral load) in Serum or Plasma by Probe with signal amplificationHCV RNA SerPl Probe+sig amp-Log#Hepatitis C virus RNAMICROHepatitis C virus (HCV), BloodLnCnc

Frequently asked questions

Code details

Code42003-4
SystemLOINC
Display nameHCV RNA Probe+sig amp [Log #/Vol]
DescriptionHepatitis C virus RNA
Short nameHCV RNA SerPl Probe+sig amp-Log#
ComponentHepatitis C virus RNA
PropertyLnCnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
MethodProbe.amp.sig
ClassMICRO
Example unitslog copies/mL
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.16
Last changed2.73

Consumer names

Hepatitis C virus (HCV), Blood

Part names

Hepatitis C virus RNALnCncPtSer/PlasQnProbe.amp.sigLog number concentrationPoint in time (spot)Serum or PlasmaProbe with signal amplification

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 42003-4 | HealthAssure