What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 40749-4: Echinococcus sp Ab CF Ql (S)

Name: LOINC Code 40749-4: Echinococcus sp Ab CF Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

40749-4 is a LOINC code used to identify Echinococcus sp Ab CF Ql (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 Echinococcus sp 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 Echinococcus sp 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

Echinococcus sp Ab [Presence] in Serum by Complement fixation
Echinococcus sp Ab
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; CF; Comp fixation; Compfix; Complement fixation; Echinococcosis; ID; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; p2; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serum; species; spp; SR

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Echinococcus sp Ab CF Ql (S) (40749-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Echinococcus sp Ab CF Ql (S)Echinococcus sp Ab [Presence] in Serum by Complement fixationEchinococcus Ab Ser Ql CFEchinococcus sp AbMICROEchinococcus sp antibody, BloodPrThr

Frequently asked questions

Code details

Code40749-4

SystemLOINC

Display nameEchinococcus sp Ab CF Ql (S)

DescriptionEchinococcus sp Ab

Short nameEchinococcus Ab Ser Ql CF

ComponentEchinococcus sp Ab

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

MethodComp fix

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.56

Consumer names

Echinococcus sp antibody, Blood

Part names

Echinococcus sp AbPrThrPtSerOrdComp fixPresence or ThresholdPoint 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.