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 6892-4: Free T4 Dialysis [Mass/Vol]

Name: LOINC Code 6892-4: Free T4 Dialysis [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:48.044Z

6892-4 is a LOINC code used to identify Free T4 Dialysis [Mass/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 Thyroxine.free. 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 Thyroxine.free. 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
Method: Dialysis

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Thyroxine (T4) free [Mass/volume] in Serum or Plasma by Dialysis
Thyroxine.free
Chemistry; Dialy; Endocrine; Endocrinology; FR; FreeT4; FT4; Level; Levothyroxine; Levo-thyroxine; L-thyroxine; Mass concentration; Non-protein bound; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; T4; T-4; T4 Free; thyroid hormone; Thyrox; Thyroxin; Thyrx; Total T4; TT4; 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

Free T4 Dialysis [Mass/Vol]Thyroxine (T4) free [Mass/volume] in Serum or Plasma by DialysisT4 Free SerPl Dialy-mCncThyroxine.freeCHEMFree T4, BloodMCnc

Frequently asked questions

Code details

Code6892-4

SystemLOINC

Display nameFree T4 Dialysis [Mass/Vol]

DescriptionThyroxine.free

Short nameT4 Free SerPl Dialy-mCnc

ComponentThyroxine.free

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

MethodDialysis

ClassCHEM

Example unitsng/dL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0h(2)

Last changed2.73

Consumer names

Free T4, Blood

Part names

Thyroxine.freeMCncPtSer/PlasQnDialysisThyroxine freeMass 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.