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 91677-5: C. parvum Ag IA.rapid Ql (Stl)

Name: LOINC Code 91677-5: C. parvum Ag IA.rapid Ql (Stl)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:21.442Z

91677-5 is a LOINC code used to identify C. parvum Ag IA.rapid Ql (Stl) 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 parvum Ag. It is commonly used with the system or sample type Stool.

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 parvum Ag. It is commonly used with the system or sample type Stool.

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: IA.rapid

What it does not mean

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

Key facts

Cryptosporidium parvum Ag [Presence] in Stool by Rapid immunoassay
Cryptosporidium parvum Ag
Antigen; Antigens; Bowel movement; C parvum; Crypt; Crypto; Cryptosporidiosis; EIA; ELFA; ELISA; Enzyme immunoassay; Faecal; Faeces; Fecal; Feces; IAA; MEIA; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Stl; Stool = Fecal; SUDS

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

C. parvum Ag IA.rapid Ql (Stl)Cryptosporidium parvum Ag [Presence] in Stool by Rapid immunoassayC parvum Ag Stl Ql IA.rapidCryptosporidium parvum AgMICROCryptosporidium parvum antigen, StoolPrThr

Frequently asked questions

Code details

Code91677-5

SystemLOINC

Display nameC. parvum Ag IA.rapid Ql (Stl)

DescriptionCryptosporidium parvum Ag

Short nameC parvum Ag Stl Ql IA.rapid

ComponentCryptosporidium parvum Ag

PropertyPrThr

TimingPt

System (specimen)Stool

ScaleOrd

MethodIA.rapid

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.66

Last changed2.66

Consumer names

Cryptosporidium parvum antigen, Stool

Part names

Cryptosporidium parvum AgPrThrPtStoolOrdIA.rapidPresence or ThresholdPoint in time (spot)Rapid immunoassay

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.