LOINCActiveObservation

LOINC Code 71885-8: Carboxyhemoglobin (BldMV) [Pure mass fraction]

71885-8 is a LOINC code used to identify Carboxyhemoglobin (BldMV) [Pure 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 Carboxyhemoglobin/Hemoglobin.total. It is commonly used with the system or sample type BldMV.

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 Carboxyhemoglobin/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: Observation

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Carboxyhemoglobin/Hemoglobin.total [Pure mass fraction] in Mixed venous blood
  • Carboxyhemoglobin/Hemoglobin.total
  • Because of the confusion that occurs in countries that report results as both decimal fraction and percent, this property was created to represent decimal fractions that are reported without units.
  • Bld mixed venous; Blood - mixed venous; Carbon monoxide.hemoglobin; Carbonmonoxyhemoglobin; Carbonyl haemoglobin; Carbonyl hemoglobin; Carbonyl Hgb; Carboxyhaemoglobin; Carboxyhemoglob; Chemistry; CO haemoglobin; CO hemoglobin; COHb; COHgb; Haemoglobin; Hb; HbCO; Hemoglobin bound with carbon dioxide; Hgb; Lung; Point in time; Pulmonary; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; 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.

Common synonyms

Carboxyhemoglobin (BldMV) [Pure mass fraction]Carboxyhemoglobin/Hemoglobin.total [Pure mass fraction] in Mixed venous bloodCOHgb MFr.DF BldMVCarboxyhemoglobin/Hemoglobin.totalCHEMCarboxyhemoglobin/Total Hgb, BloodMFr.DF

Frequently asked questions

Code details

Code71885-8
SystemLOINC
Display nameCarboxyhemoglobin (BldMV) [Pure mass fraction]
DescriptionCarboxyhemoglobin/Hemoglobin.total
Short nameCOHgb MFr.DF BldMV
ComponentCarboxyhemoglobin/Hemoglobin.total
PropertyMFr.DF
TimingPt
System (specimen)BldMV
ScaleQn
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.40
Last changed2.40

Consumer names

Carboxyhemoglobin/Total Hgb, Blood

Part names

Carboxyhemoglobin/Hemoglobin.totalMFr.DFPtBldMVQnDecimal mass 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.