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 53959-3: HCG.tumor marker Qn

Name: LOINC Code 53959-3: HCG.tumor marker Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:36.581Z

53959-3 is a LOINC code used to identify HCG.tumor marker Qn 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 Choriogonadotropin.tumor marker. It is commonly used with the system or sample type Ser/Plas.

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 Choriogonadotropin.tumor marker. It is commonly used with the system or sample type Ser/Plas.

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

Choriogonadotropin.tumor marker [Units/volume] in Serum or Plasma
Choriogonadotropin.tumor marker
Arbitrary concentration; CG; Chemistry; Choriogonadotropins total; Chorionic gonadotropin; HCG; HCG-TM; Human chorionic gonadotropin; Mark; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Tumor marker; UniversalLabOrders

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

HCG.tumor marker QnChoriogonadotropin.tumor marker [Units/volume] in Serum or PlasmaHCG-TM SerPl-aCncChoriogonadotropin.tumor markerCHEMHCG.tumor marker, BloodACnc

Frequently asked questions

Code details

Code53959-3

SystemLOINC

Display nameHCG.tumor marker Qn

DescriptionChoriogonadotropin.tumor marker

Short nameHCG-TM SerPl-aCnc

ComponentChoriogonadotropin.tumor marker

PropertyACnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHEM

Example unitsmIU/mL;mU/mLThous mIU/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.26

Last changed2.73

Consumer names

HCG.tumor marker, Blood

Part names

Choriogonadotropin.tumor markerACncPtSer/PlasQnArbitrary ConcentrationPoint in time (spot)Serum or Plasma

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.