LOINCActiveObservation

LOINC Code 97543-3: HCO3 (BldCV) [Moles/Vol]

97543-3 is a LOINC code used to identify HCO3 (BldCV) [Moles/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 Bicarbonate. It is commonly used with the system or sample type BldCV.

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 Bicarbonate. It is commonly used with the system or sample type BldCV.

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

  • Bicarbonate [Moles/volume] in Central venous blood
  • Bicarbonate
  • BIC; bicar; Bicarb; Chemistry; HCO3; Level; Point in time; QNT; Quan; Quant; Quantitative; Random; Substance concentration

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

HCO3 (BldCV) [Moles/Vol]Bicarbonate [Moles/volume] in Central venous bloodHCO3 BldCV-sCncBicarbonateCHEMBicarbonate, BloodSCnc

Frequently asked questions

Code details

Code97543-3
SystemLOINC
Display nameHCO3 (BldCV) [Moles/Vol]
DescriptionBicarbonate
Short nameHCO3 BldCV-sCnc
ComponentBicarbonate
PropertySCnc
TimingPt
System (specimen)BldCV
ScaleQn
ClassCHEM
Example unitsmmol/L
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.70
Last changed2.70

Consumer names

Bicarbonate, Blood

Part names

BicarbonateSCncPtBldCVQnSubstance ConcentrationPoint in time (spot)Blood central 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.

LOINC Code 97543-3 | HealthAssure