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 41607-3: Methemoglobin (BldMV) [Mass fraction]

Name: LOINC Code 41607-3: Methemoglobin (BldMV) [Mass fraction]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

41607-3 is a LOINC code used to identify Methemoglobin (BldMV) [Mass fraction] 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 Methemoglobin/Hemoglobin.total. It is commonly used with the system or sample type BldMV.

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 Methemoglobin/Hemoglobin.total. It is commonly used with the system or sample type BldMV.

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

Methemoglobin/Hemoglobin.total in Mixed venous blood
Methemoglobin/Hemoglobin.total
Bld mixed venous; Blood - mixed venous; Chemistry; Haemoglobin; Hb; Hemiglobin; Hgb; Hi; Mass fraction; Methaemoglobin; MetHb; Methgb; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Tot; Totl

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 Methemoglobin (BldMV) [Mass fraction] (41607-3)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Methemoglobin (BldMV) [Mass fraction]Methemoglobin/Hemoglobin.total in Mixed venous bloodMetHgb MFr BldMVMethemoglobin/Hemoglobin.totalCHEMMethemoglobin/Total Hgb, BloodMFr

Frequently asked questions

Code details

Code41607-3

SystemLOINC

Display nameMethemoglobin (BldMV) [Mass fraction]

DescriptionMethemoglobin/Hemoglobin.total

Short nameMetHgb MFr BldMV

ComponentMethemoglobin/Hemoglobin.total

PropertyMFr

TimingPt

System (specimen)BldMV

ScaleQn

ClassCHEM

Example units%

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.16

Last changed2.73

Consumer names

Methemoglobin/Total Hgb, Blood

Part names

Methemoglobin/Hemoglobin.totalMFrPtBldMVQnMass fractionPoint in time (spot)Blood mixed venous

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.