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 43800-2: HCG.beta subunit Ql (CSF)

Name: LOINC Code 43800-2: HCG.beta subunit Ql (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

43800-2 is a LOINC code used to identify HCG.beta subunit Ql (CSF) 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.beta subunit. It is commonly used with the system or sample type CSF.

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 Choriogonadotropin.beta subunit. It is commonly used with the system or sample type CSF.

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.beta subunit [Presence] in Cerebral spinal fluid
Choriogonadotropin.beta subunit
B; B HCG; Beta HCG; Beta human chorionic gonadotropin; B-HCG; Cerebral spinal fluid; Cerebrospinal Fl; CG; Chemistry; Choriogonadotropin beta chain; Choriogonadotropins total; Chorionic gonadotropin; HCG; Human chorionic gonadotropin; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Tumor marker

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for HCG.beta subunit Ql (CSF) (43800-2)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

HCG.beta subunit Ql (CSF)Choriogonadotropin.beta subunit [Presence] in Cerebral spinal fluidB-HCG CSF QlChoriogonadotropin.beta subunitCHEMHCG.beta subunit, Spinal fluidPrThr

Frequently asked questions

Code details

Code43800-2

SystemLOINC

Display nameHCG.beta subunit Ql (CSF)

DescriptionChoriogonadotropin.beta subunit

Short nameB-HCG CSF Ql

ComponentChoriogonadotropin.beta subunit

PropertyPrThr

TimingPt

System (specimen)CSF

ScaleOrd

ClassCHEM

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.56

Consumer names

HCG.beta subunit, Spinal fluid

Part names

Choriogonadotropin.beta subunitPrThrPtCSFOrdPresence or ThresholdPoint in time (spot)Cerebral spinal fluid

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.