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LOINC Code 5270-4: Parainfluenza virus 3 Ab CF (S) [Titer]

5270-4 is a LOINC code used to identify Parainfluenza virus 3 Ab CF (S) [Titer] 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 Parainfluenza virus 3 Ab. It is commonly used with the system or sample type Ser.

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 Parainfluenza virus 3 Ab. 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: Comp fix

What it does not mean

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

Key facts

  • Parainfluenza virus 3 Ab [Titer] in Serum by Complement fixation
  • Parainfluenza virus 3 Ab
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; CF; Comp fixation; Compfix; Complement fixation; Dilution factor; Dilution Factor (Titer); HPIV; HPIV3; Human respirovirus 3; ID; III; Infectious Disease; InfectiousDisease; Microbiology; Para; Parainflu; Parainfluenza type 3; Parainfluenza type III; PI3; Point in time; Random; Serum; SmQn; SR; Titer; Titered; Titre; Ttr

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

Parainfluenza virus 3 Ab CF (S) [Titer]Parainfluenza virus 3 Ab [Titer] in Serum by Complement fixationHPIV3 Ab Titr Ser CFParainfluenza virus 3 AbMICROParainfluenza virus 3 antibody, BloodTitr

Frequently asked questions

Code details

Code5270-4
SystemLOINC
Display nameParainfluenza virus 3 Ab CF (S) [Titer]
DescriptionParainfluenza virus 3 Ab
Short nameHPIV3 Ab Titr Ser CF
ComponentParainfluenza virus 3 Ab
PropertyTitr
TimingPt
System (specimen)Ser
ScaleSemiQn
MethodComp fix
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.75

Consumer names

Parainfluenza virus 3 antibody, Blood

Part names

Parainfluenza virus 3 AbTitrPtSerSemiQnComp fixTiterPoint in time (spot)SerumComplement fixation

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 5270-4 | HealthAssure