LOINCActiveBoth

LOINC Code 16324-6: ALT (RBC) [Catalytic activity/Vol]

16324-6 is a LOINC code used to identify ALT (RBC) [Catalytic activity/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 Alanine aminotransferase. It is commonly used with the system or sample type RBC.

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 Alanine aminotransferase. It is commonly used with the system or sample type RBC.

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

What it does not mean

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

Key facts

  • Alanine aminotransferase [Enzymatic activity/volume] in Red Blood Cells
  • Alanine aminotransferase
  • Ala; Alanine transaminase; ALAT; Alpha alanine; ALT; Catalytic Concentration; Chemistry; Erythrocytes; Glutamic-pyruvic transferase; Hepatology; L-alanine; Liver; Point in time; QNT; Quan; Quant; Quantitative; Random; Red blood cells; Red blood corpusles; SGPT

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

ALT (RBC) [Catalytic activity/Vol]Alanine aminotransferase [Enzymatic activity/volume] in Red Blood CellsALT RBC-cCncAlanine aminotransferaseCHEMAlanine Aminotransferase (ALT; SGPT), Red blood cellsCCnc

Frequently asked questions

Code details

Code16324-6
SystemLOINC
Display nameALT (RBC) [Catalytic activity/Vol]
DescriptionAlanine aminotransferase
Short nameALT RBC-cCnc
ComponentAlanine aminotransferase
PropertyCCnc
TimingPt
System (specimen)RBC
ScaleQn
ClassCHEM
Example unitsarb U/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.68

Consumer names

Alanine Aminotransferase (ALT; SGPT), Red blood cells

Part names

Alanine aminotransferaseCCncPtRBCQnCatalytic ConcentrationPoint in time (spot)Red Blood Cells

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 16324-6 | HealthAssure