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 30556-5: Smith extractable nuclear Ab+Ribonucleoprotein extractable nuclear Ab IF (S) [Titer]

Name: LOINC Code 30556-5: Smith extractable nuclear Ab+Ribonucleoprotein extractable nuclear Ab IF (S) [Titer]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:16.075Z

30556-5 is a LOINC code used to identify Smith extractable nuclear Ab+Ribonucleoprotein extractable nuclear Ab IF (S) [Titer] 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+Ribonucleoprotein 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+Ribonucleoprotein 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+Ribonucleoprotein extractable nuclear Ab [Titer] in Serum by Immunofluorescence
Smith extractable nuclear Ab+Ribonucleoprotein extractable nuclear Ab
ABS; Aby; ACIF; ANA; ANF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Antinuclear antibody; Autoantibodies; Autoantibody; Dilution factor; Dilution Factor (Titer); ENA; ENA RNP; ENA SM; ENA SM+RNP; FA; FANA; Fluorescent antibody; Fluoresent; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; NA; Nuc; Point in time; Random; Ribonuclear protein; RNP; Ro; Serology; Serum; SM; SmQn; SR; Time Resolved Fluorescence; Titer; Titered; Titre; TRF; Ttr

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+Ribonucleoprotein extractable nuclear Ab IF (S) [Titer]Smith extractable nuclear Ab+Ribonucleoprotein extractable nuclear Ab [Titer] in Serum by ImmunofluorescenceENA SM+RNP Ab Titr Ser IFSmith extractable nuclear Ab+Ribonucleoprotein extractable nuclear AbSEROSmith extractable nuclear Ab+Ribonucleoprotein extractable nuclear antibody, BloodTitr

Frequently asked questions

Code details

Code30556-5

SystemLOINC

Display nameSmith extractable nuclear Ab+Ribonucleoprotein extractable nuclear Ab IF (S) [Titer]

DescriptionSmith extractable nuclear Ab+Ribonucleoprotein extractable nuclear Ab

Short nameENA SM+RNP Ab Titr Ser IF

ComponentSmith extractable nuclear Ab+Ribonucleoprotein extractable nuclear Ab

PropertyTitr

TimingPt

System (specimen)Ser

ScaleSemiQn

MethodIF

ClassSERO

Example unitstiter

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.04

Last changed2.75

Consumer names

Smith extractable nuclear Ab+Ribonucleoprotein extractable nuclear antibody, Blood

Part names

Smith extractable nuclear Ab+Ribonucleoprotein extractable nuclear AbTitrPtSerSemiQnIFTiterPoint 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.