LOINCActiveBoth

LOINC Code 72974-9: PHENobarbital induced neutrophil IgG FC Ql

72974-9 is a LOINC code used to identify PHENobarbital induced neutrophil IgG FC 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 PHENobarbital induced neutrophil Ab.IgG. 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 PHENobarbital induced neutrophil Ab.IgG. 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: Flow cytometry

What it does not mean

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

Key facts

  • PHENobarbital induced neutrophil IgG Ab [Presence] in Serum or Plasma by Flow cytometry (FC)
  • PHENobarbital induced neutrophil Ab.IgG
  • (neut) Ab; (neut) IgG; ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Barbiturate; c417; Dynamic; FC; Granulocytic Ab; Immune globulin G; Immunoglobulin G; Luminal; Neut; Neutr; Neutrophils; Nirvonal; Ordinal; PHBR; Phenobarb; Pl; Plasma; Plsm; PMN; PNM; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serology; SerP; SerPl; SerPlas; Serum; Serum or plasma; 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

PHENobarbital induced neutrophil IgG FC QlPHENobarbital induced neutrophil IgG Ab [Presence] in Serum or Plasma by Flow cytometry (FC)Phenobarb (neut) IgG SerPl Ql FCPHENobarbital induced neutrophil Ab.IgGSEROPHENobarbital induced neutrophil IgG, BloodPrThr

Frequently asked questions

Code details

Code72974-9
SystemLOINC
Display namePHENobarbital induced neutrophil IgG FC Ql
DescriptionPHENobarbital induced neutrophil Ab.IgG
Short namePhenobarb (neut) IgG SerPl Ql FC
ComponentPHENobarbital induced neutrophil Ab.IgG
PropertyPrThr
TimingPt
System (specimen)Ser/Plas
ScaleOrd
MethodFlow cytometry
ClassSERO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.44
Last changed2.56

Consumer names

PHENobarbital induced neutrophil IgG, Blood

Part names

PHENobarbital induced neutrophil Ab.IgGPrThrPtSer/PlasOrdFlow cytometryPHENobarbital induced neutrophil IgGPresence or ThresholdPoint in time (spot)Serum or PlasmaFlow cytometry (FC)

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 72974-9 | HealthAssure