LOINCActiveBoth

LOINC Code 96559-0: Testosterone Free Calc [Moles/Vol]

96559-0 is a LOINC code used to identify Testosterone Free Calc [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 Testosterone.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 Testosterone.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: Calculated

What it does not mean

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

Key facts

Testosterone Free [Moles/volume] in Serum or Plasma by calculation
Testosterone.free
Free testosterone calculated based on the measured values for testosterone, sex hormone binding globulin (SHBG), and albumin, depending on the equation used. The Nanjee-Wheeler and Ly-Handelsman equations use testosterone and SHBG, and Sodergard and Vermeulen equations use testosterone, SHBG, and albumin to calculate the free testosterone. [PMID17036414]
Calc; Calculation; Chemistry; Endocrine; Endocrinology; FR; Level; Ly-Handelsman; Nanjee-Wheeler; Non-protein bound; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; Sodergard; SR; Substance concentration; Testo; Testos; Testost; Testost Free; Testosterone.unconjugated; Vermeulen

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 Calc [Moles/Vol]Testosterone Free [Moles/volume] in Serum or Plasma by calculationTestost Free SerPl Calc-sCncTestosterone.freeCHEMFree testosterone, BloodSCnc

Frequently asked questions

Code details

Code96559-0
SystemLOINC
Display nameTestosterone Free Calc [Moles/Vol]
DescriptionTestosterone.free
Short nameTestost Free SerPl Calc-sCnc
ComponentTestosterone.free
PropertySCnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
MethodCalculated
ClassCHEM
Example unitspmol/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.69
Last changed2.69

Consumer names

Free testosterone, Blood

Part names

Testosterone.freeSCncPtSer/PlasQnCalculatedTestosterone FreeSubstance 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.

LOINC Code 96559-0 | HealthAssure