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 34939-9: Tumor necrosis factor.alpha [Moles/Vol]

Name: LOINC Code 34939-9: Tumor necrosis factor.alpha [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

34939-9 is a LOINC code used to identify Tumor necrosis factor.alpha [Moles/Vol] 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 Tumor necrosis factor.alpha. It is commonly used with the system or sample type Ser/Plas.

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 Tumor necrosis factor.alpha. 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

Tumor necrosis factor.alpha [Moles/volume] in Serum or Plasma
Tumor necrosis factor.alpha
Alfa; A-Tumor Necrosis Fact; Cachectin; Cachectine; Chemistry; Fac; Fact; Level; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration; TNF

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 Tumor necrosis factor.alpha [Moles/Vol] (34939-9)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Tumor necrosis factor.alpha [Moles/Vol]Tumor necrosis factor.alpha [Moles/volume] in Serum or PlasmaA-Tumor Necrosis Fact SerPl-sCncTumor necrosis factor.alphaCHEMTumor necrosis factor.alpha, BloodSCnc

Frequently asked questions

Code details

Code34939-9

SystemLOINC

Display nameTumor necrosis factor.alpha [Moles/Vol]

DescriptionTumor necrosis factor.alpha

Short nameA-Tumor Necrosis Fact SerPl-sCnc

ComponentTumor necrosis factor.alpha

PropertySCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHEM

Example unitspmol/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.11

Last changed2.73

Consumer names

Tumor necrosis factor.alpha, Blood

Part names

Tumor necrosis factor.alphaSCncPtSer/PlasQnSubstance 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.