LOINCActiveObservation

LOINC Code 100738-4: ALT.macromolecular Ql

100738-4 is a LOINC code used to identify ALT.macromolecular Ql 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 Alanine aminotransferase.macromolecular. It is commonly used with the system or sample type Ser/Plas.

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 Alanine aminotransferase.macromolecular. 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: Observation

What it does not mean

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

Key facts

  • Alanine aminotransferase.macromolecular [Presence] in Serum or Plasma
  • Alanine aminotransferase.macromolecular
  • Ala; Alanine transaminase; ALAT; Alpha alanine; ALT; ALT Macro; Chemistry; Glutamic-pyruvic transferase; L-alanine; Ordinal; Pl; Plasma; Plsm; Point in time; PR; QL; Qual; Qualitative; Random; Screen; SerP; SerPl; SerPlas; Serum; Serum or plasma; SGPT; SR

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

ALT.macromolecular QlAlanine aminotransferase.macromolecular [Presence] in Serum or PlasmaALT Macro SerPl QlAlanine aminotransferase.macromolecularCHEMMacromolecular alanine aminotransferase, BloodPrThr

Frequently asked questions

Code details

Code100738-4
SystemLOINC
Display nameALT.macromolecular Ql
DescriptionAlanine aminotransferase.macromolecular
Short nameALT Macro SerPl Ql
ComponentAlanine aminotransferase.macromolecular
PropertyPrThr
TimingPt
System (specimen)Ser/Plas
ScaleOrd
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.73
Last changed2.73

Consumer names

Macromolecular alanine aminotransferase, Blood

Part names

Alanine aminotransferase.macromolecularPrThrPtSer/PlasOrdPresence or ThresholdPoint 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 100738-4 | HealthAssure