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 20400-8: Smooth nuclear envelope ANA pattern (S) [Titer]

Name: LOINC Code 20400-8: Smooth nuclear envelope ANA pattern (S) [Titer]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:28.847Z

20400-8 is a LOINC code used to identify Smooth nuclear envelope ANA pattern (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 Nuclear Ab pattern.smooth nuclear envelope. 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 Nuclear Ab pattern.smooth nuclear envelope. 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

What it does not mean

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

Key facts

Smooth nuclear envelope nuclear Ab pattern [Titer] in Serum
Nuclear Ab pattern.smooth nuclear envelope
ANA; ANA Pat; ANA smooth nucl env; ANF; Antinuclear antibody; Dilution factor; Dilution Factor (Titer); Membranous; NA; Nuc; Nuclear membrane; Nuclear rim; Point in time; Random; Serology; Serum; SmQn; SR; Titer; Titered; Titre; 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

Smooth nuclear envelope ANA pattern (S) [Titer]Smooth nuclear envelope nuclear Ab pattern [Titer] in SerumANA smooth nucl env Titr SerNuclear Ab pattern.smooth nuclear envelopeSEROSmooth nuclear envelope ANA pattern, BloodTitr

Frequently asked questions

Code details

Code20400-8

SystemLOINC

Display nameSmooth nuclear envelope ANA pattern (S) [Titer]

DescriptionNuclear Ab pattern.smooth nuclear envelope

Short nameANA smooth nucl env Titr Ser

ComponentNuclear Ab pattern.smooth nuclear envelope

PropertyTitr

TimingPt

System (specimen)Ser

ScaleSemiQn

ClassSERO

Example unitstiter

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.75

Consumer names

Smooth nuclear envelope ANA pattern, Blood

Part names

Nuclear Ab pattern.smooth nuclear envelopeTitrPtSerSemiQnSmooth nuclear envelope nuclear Ab patternTiterPoint in time (spot)Serum

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.