LOINCActiveObservation

LOINC Code 2325-9: Gamma glutamyl transferase/Aspartate aminotransferase [Catalytic ratio]

2325-9 is a LOINC code used to identify Gamma glutamyl transferase/Aspartate aminotransferase [Catalytic 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 Gamma glutamyl transferase/Aspartate aminotransferase. 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 Gamma glutamyl transferase/Aspartate aminotransferase. 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

  • Gamma glutamyl transferase/Aspartate aminotransferase [Enzymatic activity ratio] in Serum or Plasma
  • Gamma glutamyl transferase/Aspartate aminotransferase
  • Asp; Aspartate amino transferase; Aspartate transaminase; Aspartic acid; AST; Catalytic Concentration Ratio; Catalytic Ratio; CCrto; Chemistry; Enzymatic activity ratio; Gamma glutamyl transpeptidase; Gamma-GTP; GGT; GGTP; Glutamic oxaloacetic transaminase; GT; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SGOT; SR

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

Gamma glutamyl transferase/Aspartate aminotransferase [Catalytic ratio]Gamma glutamyl transferase/Aspartate aminotransferase [Enzymatic activity ratio] in Serum or PlasmaGGT/AST SerPl-cRtoGamma glutamyl transferase/Aspartate aminotransferaseCHEMGamma glutamyl transferase/Aspartate Aminotransferase, BloodCRto

Frequently asked questions

Code details

Code2325-9
SystemLOINC
Display nameGamma glutamyl transferase/Aspartate aminotransferase [Catalytic ratio]
DescriptionGamma glutamyl transferase/Aspartate aminotransferase
Short nameGGT/AST SerPl-cRto
ComponentGamma glutamyl transferase/Aspartate aminotransferase
PropertyCRto
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Gamma glutamyl transferase/Aspartate Aminotransferase, Blood

Part names

Gamma glutamyl transferase/Aspartate aminotransferaseCRtoPtSer/PlasQnCatalytic 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 2325-9 | HealthAssure