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 55171-3: Cytoplasmic Ab pattern IF (S) [Interp]

Name: LOINC Code 55171-3: Cytoplasmic Ab pattern IF (S) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:37.143Z

55171-3 is a LOINC code used to identify Cytoplasmic Ab pattern IF (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 Cytoplasmic Ab pattern. 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 Cytoplasmic Ab pattern. 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

Cytoplasmic Ab pattern [Interpretation] in Serum by Immunofluorescence
Cytoplasmic Ab pattern
ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; CA Pat; Cytopl; Cytoplas; FA; Fluorescent antibody; Fluoresent; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Nominal; Point in time; Random; 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

Cytoplasmic Ab pattern IF (S) [Interp]Cytoplasmic Ab pattern [Interpretation] in Serum by ImmunofluorescenceCytoplasmic Ab pattern Ser IF-ImpCytoplasmic Ab patternSEROCytoplasmic Ab pattern, BloodImp

Frequently asked questions

Code details

Code55171-3

SystemLOINC

Display nameCytoplasmic Ab pattern IF (S) [Interp]

DescriptionCytoplasmic Ab pattern

Short nameCytoplasmic Ab pattern Ser IF-Imp

ComponentCytoplasmic Ab pattern

PropertyImp

TimingPt

System (specimen)Ser

ScaleNom

MethodIF

ClassSERO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.27

Last changed2.73

Consumer names

Cytoplasmic Ab pattern, Blood

Part names

Cytoplasmic Ab patternImpPtSerNomIFImpression/interpretation of studyPoint 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.