LOINCActiveBoth

LOINC Code 2182-4: Cytochrome B reductase (Amn fld) [Catalytic activity/Vol]

2182-4 is a LOINC code used to identify Cytochrome B reductase (Amn fld) [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 Cytochrome B reductase. It is commonly used with the system or sample type Amnio fld.

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 Cytochrome B reductase. It is commonly used with the system or sample type Amnio fld.

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

  • Cytochrome B reductase [Enzymatic activity/volume] in Amniotic fluid
  • Cytochrome B reductase
  • AF; Amn; Amn fl; Amnio; Amniotic flu; Amniotic fluid; Catalytic Concentration; Chemistry; CyB Reduct; cyt; Methemoglobin diaphorase; Methemoglobin reductase; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Cytochrome B reductase (Amn fld) [Catalytic activity/Vol]Cytochrome B reductase [Enzymatic activity/volume] in Amniotic fluidCyB Reduct Amn-cCncCytochrome B reductaseCHEMCytochrome B Reductase, Amniotic fluidCCnc

Frequently asked questions

Code details

Code2182-4
SystemLOINC
Display nameCytochrome B reductase (Amn fld) [Catalytic activity/Vol]
DescriptionCytochrome B reductase
Short nameCyB Reduct Amn-cCnc
ComponentCytochrome B reductase
PropertyCCnc
TimingPt
System (specimen)Amnio fld
ScaleQn
ClassCHEM
Example unitsarb U/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Cytochrome B Reductase, Amniotic fluid

Part names

Cytochrome B reductaseCCncPtAmnio fldQnCatalytic ConcentrationPoint in time (spot)Amniotic fluid

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 2182-4 | HealthAssure