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LOINC Code 63221-6: DNA double strand Ab IF Ql (Pleur fld)

63221-6 is a LOINC code used to identify DNA double strand Ab IF Ql (Pleur fld) 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 DNA double strand Ab. It is commonly used with the system or sample type Plr fld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 DNA double strand Ab. It is commonly used with the system or sample type Plr fld.

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

  • DNA double strand Ab [Presence] in Pleural fluid by Immunofluorescence
  • DNA double strand Ab
  • ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; Deoxyribonucleic acid; DNA binding ab; ds; dsDNA; dsnda; FA; Fluorescent antibody; Fluoresent; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Lung; Native DNA; N-DNA; Ordinal; Pleural; Pleural fluid; Point in time; PR; Pulmonary; Pulmonology; Ql; Qual; Qualitative; Random; Respiratory; Screen; Serology; Stranded; Strnd; thoracentesis fluid; 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

DNA double strand Ab IF Ql (Pleur fld)DNA double strand Ab [Presence] in Pleural fluid by ImmunofluorescencedsDNA Ab Plr Ql IFDNA double strand AbSERODNA double strand antibody, Pleural fluidPrThr

Frequently asked questions

Code details

Code63221-6
SystemLOINC
Display nameDNA double strand Ab IF Ql (Pleur fld)
DescriptionDNA double strand Ab
Short namedsDNA Ab Plr Ql IF
ComponentDNA double strand Ab
PropertyPrThr
TimingPt
System (specimen)Plr fld
ScaleOrd
MethodIF
ClassSERO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.56

Consumer names

DNA double strand antibody, Pleural fluid

Part names

DNA double strand AbPrThrPtPlr fldOrdIFPresence or ThresholdPoint in time (spot)Pleural fluidImmunofluorescence (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.