What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 16412-9: AST (RBC) [Catalytic activity/Vol]

Name: LOINC Code 16412-9: AST (RBC) [Catalytic activity/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:26.377Z

16412-9 is a LOINC code used to identify AST (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 Aspartate 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 Aspartate 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

Aspartate aminotransferase [Enzymatic activity/volume] in Red Blood Cells
Aspartate aminotransferase
Asp; Aspartate amino transferase; Aspartate transaminase; Aspartic acid; AST; Catalytic Concentration; Chemistry; Erythrocytes; Glutamic oxaloacetic transaminase; Hepatology; Liver; Point in time; QNT; Quan; Quant; Quantitative; Random; Red blood cells; Red blood corpusles; SGOT

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

AST (RBC) [Catalytic activity/Vol]Aspartate aminotransferase [Enzymatic activity/volume] in Red Blood CellsAST RBC-cCncAspartate aminotransferaseCHEMAspartate Aminotransferase (AST; SGOT), Red blood cellsCCnc

Frequently asked questions

Code details

Code16412-9

SystemLOINC

Display nameAST (RBC) [Catalytic activity/Vol]

DescriptionAspartate aminotransferase

Short nameAST RBC-cCnc

ComponentAspartate 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

Aspartate Aminotransferase (AST; SGOT), Red blood cells

Part names

Aspartate 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.