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 34521-5: Carnitine acyltransferase (Tiss) [Catalytic activity/Mass]

Name: LOINC Code 34521-5: Carnitine acyltransferase (Tiss) [Catalytic activity/Mass]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

34521-5 is a LOINC code used to identify Carnitine acyltransferase (Tiss) [Catalytic activity/Mass] 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 Carnitine acyltransferase. It is commonly used with the system or sample type Tiss.

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 Carnitine acyltransferase. It is commonly used with the system or sample type Tiss.

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

Carnitine acyltransferase [Enzymatic activity/mass] in Tissue
Carnitine acyltransferase
Carnitine AcT; Carnitine acyl transferase; Carnitine palmitoyl transerase; Carnitine palmitoyltranserase; Carnitine.total; Catalytic Content; Chemistry; Point in time; QNT; Quan; Quant; Quantitative; Random; Tissue; Tissue, unspecified

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Carnitine acyltransferase (Tiss) [Catalytic activity/Mass] (34521-5)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Carnitine acyltransferase (Tiss) [Catalytic activity/Mass]Carnitine acyltransferase [Enzymatic activity/mass] in TissueCarnitine AcT Tiss-cCntCarnitine acyltransferaseCHEMCarnitine acyltransferase, TissueCCnt

Frequently asked questions

Code details

Code34521-5

SystemLOINC

Display nameCarnitine acyltransferase (Tiss) [Catalytic activity/Mass]

DescriptionCarnitine acyltransferase

Short nameCarnitine AcT Tiss-cCnt

ComponentCarnitine acyltransferase

PropertyCCnt

TimingPt

System (specimen)Tiss

ScaleQn

ClassCHEM

Example unitsnmol/min/mg protein

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.10

Last changed2.42

Consumer names

Carnitine acyltransferase, Tissue

Part names

Carnitine acyltransferaseCCntPtTissQnCatalytic ContentPoint in time (spot)Tissue and Smears

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.