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.

LOINCActiveObservation

LOINC Code 54148-2: Autoantibodies IF Hep2 substrate Nar (S) [Interp]

Name: LOINC Code 54148-2: Autoantibodies IF Hep2 substrate Nar (S) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:36.582Z

54148-2 is a LOINC code used to identify Autoantibodies IF Hep2 substrate Nar (S) [Interp] 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 Autoantibodies. 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 Autoantibodies. 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: Observation
Method: IF Hep2 substrate

What it does not mean

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

Key facts

Autoantibodies [Interpretation] in Serum by Immunofluorescence (IF) Hep2 substrate Narrative
Autoantibodies
ACIF; Anticomplement Immunofluorescence; Auto Ab; FA; Fluorescent antibody; Fluoresent; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Narrative; Point in time; Random; Report; 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.

Common synonyms

Autoantibodies IF Hep2 substrate Nar (S) [Interp]Autoantibodies [Interpretation] in Serum by Immunofluorescence (IF) Hep2 substrate NarrativeAuto Ab Ser HEp2 subst-ImpAutoantibodiesSEROInterpretation of Autoantibodies test result, BloodImp

Frequently asked questions

Code details

Code54148-2

SystemLOINC

Display nameAutoantibodies IF Hep2 substrate Nar (S) [Interp]

DescriptionAutoantibodies

Short nameAuto Ab Ser HEp2 subst-Imp

ComponentAutoantibodies

PropertyImp

TimingPt

System (specimen)Ser

ScaleNar

MethodIF Hep2 substrate

ClassSERO

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.27

Last changed2.27

Consumer names

Interpretation of Autoantibodies test result, Blood

Part names

AutoantibodiesImpPtSerNarIF Hep2 substrateImpression/interpretation of studyPoint in time (spot)SerumImmunofluorescence (IF) Hep2 substrate

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.