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 74891-3: Medium-chain Acyl CoA dehydrogenase (WBC) [Catalytic activity/Mass]

Name: LOINC Code 74891-3: Medium-chain Acyl CoA dehydrogenase (WBC) [Catalytic activity/Mass]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

74891-3 is a LOINC code used to identify Medium-chain Acyl CoA dehydrogenase (WBC) [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 Medium-chain Acyl CoA dehydrogenase. It is commonly used with the system or sample type WBC.

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 Medium-chain Acyl CoA dehydrogenase. It is commonly used with the system or sample type WBC.

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

Medium-chain Acyl CoA dehydrogenase [Enzymatic activity/mass] in Leukocytes
Medium-chain Acyl CoA dehydrogenase
ACAD; AcdA; Acyl CoA dehydrogenase, medium chain; Acyl CoA dehydrogenase.medium chain; Catalytic Content; Chains; Chemistry; Chn; Dehydrog; Dehyrdogenase; Leukocytes; MCAD; Point in time; QNT; Quan; Quant; Quantitative; Random; WBCs; White blood cells

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 Medium-chain Acyl CoA dehydrogenase (WBC) [Catalytic activity/Mass] (74891-3)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Medium-chain Acyl CoA dehydrogenase (WBC) [Catalytic activity/Mass]Medium-chain Acyl CoA dehydrogenase [Enzymatic activity/mass] in LeukocytesMCAD WBC-cCntMedium-chain Acyl CoA dehydrogenaseCHEMMedium-chain acyl coA dehydrogenase, White blood cellsCCnt

Frequently asked questions

Code details

Code74891-3

SystemLOINC

Display nameMedium-chain Acyl CoA dehydrogenase (WBC) [Catalytic activity/Mass]

DescriptionMedium-chain Acyl CoA dehydrogenase

Short nameMCAD WBC-cCnt

ComponentMedium-chain Acyl CoA dehydrogenase

PropertyCCnt

TimingPt

System (specimen)WBC

ScaleQn

ClassCHEM

Example unitsnmol/min/mg protein

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.48

Last changed2.48

Consumer names

Medium-chain acyl coA dehydrogenase, White blood cells

Part names

Medium-chain Acyl CoA dehydrogenaseCCntPtWBCQnCatalytic ContentPoint in time (spot)White 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.