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 566-0: Cryptosporidium sp Ag IF Ql (Specimen)

Name: LOINC Code 566-0: Cryptosporidium sp Ag IF Ql (Specimen)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.263Z

566-0 is a LOINC code used to identify Cryptosporidium sp Ag IF Ql (Specimen) 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 Cryptosporidium sp Ag. It is commonly used with the system or sample type XXX.

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 Cryptosporidium sp Ag. It is commonly used with the system or sample type XXX.

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: IF

What it does not mean

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

Key facts

Cryptosporidium sp Ag [Presence] in Specimen by Immunofluorescence
Cryptosporidium sp Ag
ACIF; Anticomplement Immunofluorescence; Antigen; Antigens; Crypt; Crypto; Cryptosporidiosis; DFA; FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; Microbiology; Misc; Miscellaneous; Ordinal; Other; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Spec; species; spp; Time Resolved Fluorescence; To be specified in another part of the message; TRF; Unspecified

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

Cryptosporidium sp Ag IF Ql (Specimen)Cryptosporidium sp Ag [Presence] in Specimen by ImmunofluorescenceCryptosp Ag Spec Ql IFCryptosporidium sp AgMICROCryptosporidium sp antigen, SpecimenPrThr

Frequently asked questions

Code details

Code566-0

SystemLOINC

Display nameCryptosporidium sp Ag IF Ql (Specimen)

DescriptionCryptosporidium sp Ag

Short nameCryptosp Ag Spec Ql IF

ComponentCryptosporidium sp Ag

PropertyPrThr

TimingPt

System (specimen)XXX

ScaleOrd

MethodIF

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.73

Consumer names

Cryptosporidium sp antigen, Specimen

Part names

Cryptosporidium sp AgPrThrPtXXXOrdIFPresence or ThresholdPoint in time (spot)Immunofluorescence (IF)

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.