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.

LOINCActiveBoth

LOINC Code 72972-3: Phenytoin induced neutrophil IgG FC Ql

Name: LOINC Code 72972-3: Phenytoin induced neutrophil IgG FC Ql
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:52.633Z

72972-3 is a LOINC code used to identify Phenytoin 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 Phenytoin 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 Phenytoin 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

Phenytoin induced neutrophil IgG Ab [Presence] in Serum or Plasma by Flow cytometry (FC)
Phenytoin induced neutrophil Ab.IgG
(neut) Ab; (neut) IgG; ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; DI-HYDAN; Dilantin; Dilj; Diphenylhydantoin; DPH; Dynamic; Epanutin; FC; Fenantoin; Granulocytic Ab; Immune globulin G; Immunoglobulin G; Lehydan; Neut; Neutr; Neutrophils; Ordinal; Phenhydan; PHYT; Pl; Plasma; Plsm; PMN; PNM; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serology; SerP; SerPl; SerPlas; Serum; Serum or plasma; Sinergina; SR; Zentropil

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

Phenytoin induced neutrophil IgG FC QlPhenytoin induced neutrophil IgG Ab [Presence] in Serum or Plasma by Flow cytometry (FC)Phenytoin (neut) IgG SerPl Ql FCPhenytoin induced neutrophil Ab.IgGSEROPhenytoin induced neutrophil IgG, BloodPrThr

Frequently asked questions

Code details

Code72972-3

SystemLOINC

Display namePhenytoin induced neutrophil IgG FC Ql

DescriptionPhenytoin induced neutrophil Ab.IgG

Short namePhenytoin (neut) IgG SerPl Ql FC

ComponentPhenytoin 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

Phenytoin induced neutrophil IgG, Blood

Part names

Phenytoin induced neutrophil Ab.IgGPrThrPtSer/PlasOrdFlow cytometryPhenytoin 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.