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.

LOINCActiveObservation

LOINC Code 77341-6: Anion gap Calculated.4Ions (S/P/Bld) [Moles/Vol]

Name: LOINC Code 77341-6: Anion gap Calculated.4Ions (S/P/Bld) [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:57.647Z

77341-6 is a LOINC code used to identify Anion gap Calculated.4Ions (S/P/Bld) [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 Anion gap. It is commonly used with the system or sample type Ser/Plas/Bld.

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 Anion gap. It is commonly used with the system or sample type Ser/Plas/Bld.

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
Method: Calculated.4Ions

What it does not mean

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

Key facts

Anion gap in Serum, Plasma or Blood by Calculated.4Ions
Anion gap
Ag; AnGAP; Blood; Calc; Calculation; Chemistry; Level; LimitedUseLabOrders; Pl; PlasBld; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; SerPlBld; Serum; Serum or plasma; Serum, plasma or whole blood; SR; Substance concentration; WB; Whole blood

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

Anion gap Calculated.4Ions (S/P/Bld) [Moles/Vol]Anion gap in Serum, Plasma or Blood by Calculated.4IonsAnion Gap SerPlBld Calculated.4Ions-sCncAnion gapCHEMAnion gap, BloodSCnc

Frequently asked questions

Code details

Code77341-6

SystemLOINC

Display nameAnion gap Calculated.4Ions (S/P/Bld) [Moles/Vol]

DescriptionAnion gap

Short nameAnion Gap SerPlBld Calculated.4Ions-sCnc

ComponentAnion gap

PropertySCnc

TimingPt

System (specimen)Ser/Plas/Bld

ScaleQn

MethodCalculated.4Ions

ClassCHEM

Example unitsmmol/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.52

Last changed2.79

Consumer names

Anion gap, Blood

Part names

Anion gapSCncPtSer/Plas/BldQnCalculated.4IonsSubstance ConcentrationPoint in time (spot)Serum, Plasma or Blood

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.