LOINCActiveBoth

LOINC Code 33037-3: Anion gap Calc [Moles/Vol]

33037-3 is a LOINC code used to identify Anion gap Calc [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.

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

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
  • Method: Calculated

What it does not mean

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

Key facts

  • Anion gap in Serum or Plasma by calculation
  • Anion gap
  • Ag; AnGAP; Calc; Calculation; Chemistry; Level; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; 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

Anion gap Calc [Moles/Vol]Anion gap in Serum or Plasma by calculationAnion Gap SerPl Calc-sCncAnion gapCHEMAnion gap, BloodSCnc

Frequently asked questions

Code details

Code33037-3
SystemLOINC
Display nameAnion gap Calc [Moles/Vol]
DescriptionAnion gap
Short nameAnion Gap SerPl Calc-sCnc
ComponentAnion gap
PropertySCnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
MethodCalculated
ClassCHEM
Example unitsmmol/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.09
Last changed2.79

Consumer names

Anion gap, Blood

Part names

Anion gapSCncPtSer/PlasQnCalculatedSubstance ConcentrationPoint in time (spot)Serum or Plasma

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 33037-3 | HealthAssure