LOINCActiveBoth

LOINC Code 80613-3: HCO3 Unsp time (U) [Moles/Vol]

80613-3 is a LOINC code used to identify HCO3 Unsp time (U) [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 Urine.

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 Urine.

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

Bicarbonate [Moles/volume] in Urine collected for unspecified duration
Bicarbonate
This result code is to be used for urine test results with timed intervals other that 24H or random and where the collection time is reported using the collection duration term [LOINC13362-9].
?Tm; BIC; bicar; Bicarb; Chemistry; HCO3; Level; QNT; Quan; Quant; Quantitative; Substance Concentration; UA; UR; Urn

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 Unsp time (U) [Moles/Vol]Bicarbonate [Moles/volume] in Urine collected for unspecified durationHCO3 ?Tm Ur-sCncBicarbonateCHEMBicarbonate, UrineSCnc

Frequently asked questions

Code details

Code80613-3
SystemLOINC
Display nameHCO3 Unsp time (U) [Moles/Vol]
DescriptionBicarbonate
Short nameHCO3 ?Tm Ur-sCnc
ComponentBicarbonate
PropertySCnc
TimingXXX
System (specimen)Urine
ScaleQn
ClassCHEM
Example unitsmmol/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.56
Last changed2.56

Consumer names

Bicarbonate, Urine

Part names

BicarbonateSCncXXXUrineQnSubstance ConcentrationUnspecified

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 80613-3 | HealthAssure