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 16491-3: Brush border Ab IF Ql (S)

Name: LOINC Code 16491-3: Brush border Ab IF Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

16491-3 is a LOINC code used to identify Brush border Ab IF 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 Brush border 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 Brush border 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: IF

What it does not mean

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

Key facts

Brush border Ab [Presence] in Serum by Immunofluorescence
Brush border Ab
ABBA; ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; BBA; FA; Fluorescent antibody; Fluoresent; Gastro; Gastroenterology; GI; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Kidney; Nephrology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Renal; Screen; Serology; Serum; SR; Time Resolved Fluorescence; TRF

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 Brush border Ab IF Ql (S) (16491-3)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Brush border Ab IF Ql (S)Brush border Ab [Presence] in Serum by ImmunofluorescenceBrush border Ab Ser Ql IFBrush border AbSEROBrush Border antibody, BloodPrThr

Frequently asked questions

Code details

Code16491-3

SystemLOINC

Display nameBrush border Ab IF Ql (S)

DescriptionBrush border Ab

Short nameBrush border Ab Ser Ql IF

ComponentBrush border Ab

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

MethodIF

ClassSERO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.56

Consumer names

Brush Border antibody, Blood

Part names

Brush border AbPrThrPtSerOrdIFPresence or ThresholdPoint in time (spot)SerumImmunofluorescence (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.