LOINCActiveObservation

LOINC Code 24125-7: Androgen free Index [Molar ratio]

24125-7 is a LOINC code used to identify Androgen free Index [Molar ratio] 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 Androgen.free index. 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 Androgen.free index. 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: Observation

What it does not mean

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

Key facts

  • Androgen free Index in Serum or Plasma
  • Androgen.free index
  • Androgen FAI; Chemistry; FAI; FR; Free testosterone index; FTI; Non-protein bound; Normalized androgen ratio; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Scrto; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration ratio; Substance ratio

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

Androgen free Index [Molar ratio]Androgen free Index in Serum or PlasmaAndrogen FAI SerPl-sRtoAndrogen.free indexCHEMFree androgen index, BloodSRto

Frequently asked questions

Code details

Code24125-7
SystemLOINC
Display nameAndrogen free Index [Molar ratio]
DescriptionAndrogen.free index
Short nameAndrogen FAI SerPl-sRto
ComponentAndrogen.free index
PropertySRto
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHEM
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0o
Last changed2.73

Consumer names

Free androgen index, Blood

Part names

Androgen.free indexSRtoPtSer/PlasQnAndrogen free IndexSubstance RatioPoint 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 24125-7 | HealthAssure