HealthAssure
HealthAssureGood Life
LOINCActiveBoth

LOINC Code 49043-3: Testosterone Free/Testosterone.total DL <= 1.0 ng/dL [Mass fraction]

49043-3 is a LOINC code used to identify Testosterone Free/Testosterone.total DL <= 1.0 ng/dL [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.free/Testosterone.total. 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 Testosterone.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: ACTIVE
  • Order vs observation: Both
  • Method: Detection limit <= 1.0 ng/dL

What it does not mean

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

Key facts

  • Testosterone Free/Testosterone.total in Serum or Plasma by Detection limit <= 1.0 ng/dL
  • Testosterone.free/Testosterone.total
  • Chemistry; DL&lt;=1.0 ng/dL; FR; Mass fraction; Nasogastric; 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 Free; Testosterone.unconjugated; 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 Free/Testosterone.total DL <= 1.0 ng/dL [Mass fraction]Testosterone Free/Testosterone.total in Serum or Plasma by Detection limit <= 1.0 ng/dLTestost Free MFr SerPl DL<=1.0 ng/dLTestosterone.free/Testosterone.totalCHEMFree testosterone/Testosterone.total, BloodMFr

Frequently asked questions

Code details

Code49043-3
SystemLOINC
Display nameTestosterone Free/Testosterone.total DL <= 1.0 ng/dL [Mass fraction]
DescriptionTestosterone.free/Testosterone.total
Short nameTestost Free MFr SerPl DL<=1.0 ng/dL
ComponentTestosterone.free/Testosterone.total
PropertyMFr
TimingPt
System (specimen)Ser/Plas
ScaleQn
MethodDetection limit <= 1.0 ng/dL
ClassCHEM
Example units%
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.21
Last changed2.73

Consumer names

Free testosterone/Testosterone.total, Blood

Part names

Testosterone.free/Testosterone.totalMFrPtSer/PlasQnDetection limit <= 1.0 ng/dLMass 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.