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 63363-6: TSH receptor Ab Qn (Bld fetus)

Name: LOINC Code 63363-6: TSH receptor Ab Qn (Bld fetus)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:42.802Z

63363-6 is a LOINC code used to identify TSH receptor Ab Qn (Bld fetus) 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 Thyrotropin receptor Ab. It is commonly used with the system or sample type Bld^Fetus.

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 Thyrotropin receptor Ab. It is commonly used with the system or sample type Bld^Fetus.

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

Thyrotropin receptor Ab [Units/volume] in Blood from Fetus
Thyrotropin receptor Ab
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Blood; Endocrine; Endocrinology; Fetal; Gyn; Gynecology; OB; ObGyn; Obstetrics; Point in time; QNT; Quan; Quant; Quantitative; Random; Rec; Recept; Receptors; Recp; Recptr; Serology; Thyroid stimulating hormone; Thyroid stimulating hormone receptor antibody; Thyrotropic hormone; TRAb; TSH; TSH Recep; WB; Whole blood

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

TSH receptor Ab Qn (Bld fetus)Thyrotropin receptor Ab [Units/volume] in Blood from FetusTSH Recep Ab Bld Fetus-aCncThyrotropin receptor AbSEROFetal TSH receptor antibodyACnc

Frequently asked questions

Code details

Code63363-6

SystemLOINC

Display nameTSH receptor Ab Qn (Bld fetus)

DescriptionThyrotropin receptor Ab

Short nameTSH Recep Ab Bld Fetus-aCnc

ComponentThyrotropin receptor Ab

PropertyACnc

TimingPt

System (specimen)Bld^Fetus

ScaleQn

ClassSERO

Example unitsIU/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.70

Consumer names

Fetal TSH receptor antibody

Part names

Thyrotropin receptor AbACncPtBld^FetusQnArbitrary ConcentrationPoint in time (spot)Blood^Fetus

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.