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.

LOINCObservation

LOINC Code 41869-9: Testosterone.bioavailable+Free/Testosterone.total [Mass fraction]

Name: LOINC Code 41869-9: Testosterone.bioavailable+Free/Testosterone.total [Mass fraction]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:28.126Z

41869-9 is a LOINC code used to identify Testosterone.bioavailable+Free/Testosterone.total [Mass fraction] 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 Testosterone.bioavailable+Free/Testosterone.total. 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 Testosterone.bioavailable+Free/Testosterone.total. 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: DEPRECATED
Order vs observation: Observation

What it does not mean

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

Key facts

Deprecated Testosterone.bioavailable+Free/Testosterone.total in Serum or Plasma
Testosterone.bioavailable+Free/Testosterone.total
Chemistry; FR; Mass fraction; Non-protein bound; Percent; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Testo; Testos; Testost; Testost Bioavail+Free; Tot; Totl

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

Testosterone.bioavailable+Free/Testosterone.total [Mass fraction]Deprecated Testosterone.bioavailable+Free/Testosterone.total in Serum or PlasmaDeprecated Testost Bioavail+Free MFr SerTestosterone.bioavailable+Free/Testosterone.totalCHEMBioavailable and Free Testosterone/Testosterone.total, BloodMFr

Frequently asked questions

Code details

Code41869-9

SystemLOINC

Display nameTestosterone.bioavailable+Free/Testosterone.total [Mass fraction]

DescriptionTestosterone.bioavailable+Free/Testosterone.total

Short nameDeprecated Testost Bioavail+Free MFr Ser

ComponentTestosterone.bioavailable+Free/Testosterone.total

PropertyMFr

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHEM

Example units%

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.16

Last changed2.70

Consumer names

Bioavailable and Free Testosterone/Testosterone.total, Blood

Part names

Testosterone.bioavailable+Free/Testosterone.totalMFrPtSer/PlasQnMass fractionPoint 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.