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 17591-9: Smith extractable nuclear Ab IF Ql (S)

Name: LOINC Code 17591-9: Smith extractable nuclear Ab IF Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:26.982Z

17591-9 is a LOINC code used to identify Smith extractable nuclear 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 Smith extractable nuclear Ab. It is commonly used with the system or sample type Ser.

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 Smith extractable nuclear 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

Smith extractable nuclear Ab [Presence] in Serum by Immunofluorescence
Smith extractable nuclear Ab
ABS; Aby; ACIF; ANA; ANF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Antinuclear antibody; Autoantibodies; Autoantibody; ENA; ENA SM; FA; FANA; Fluorescent antibody; Fluoresent; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; NA; Nuc; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serology; Serum; SM; 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.

Common synonyms

Smith extractable nuclear Ab IF Ql (S)Smith extractable nuclear Ab [Presence] in Serum by ImmunofluorescenceENA SM Ab Ser Ql IFSmith extractable nuclear AbSEROSmith extractable nuclear antibody, BloodPrThr

Frequently asked questions

Code details

Code17591-9

SystemLOINC

Display nameSmith extractable nuclear Ab IF Ql (S)

DescriptionSmith extractable nuclear Ab

Short nameENA SM Ab Ser Ql IF

ComponentSmith extractable nuclear 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

Smith extractable nuclear antibody, Blood

Part names

Smith extractable nuclear 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.