LOINCActiveBoth

LOINC Code 93423-2: Glial fibrillary acidic protein alpha subunit IgG IF (S) [Titer]

93423-2 is a LOINC code used to identify Glial fibrillary acidic protein alpha subunit IgG IF (S) [Titer] 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 Glial fibrillary acidic protein.alpha subunit Ab.IgG. It is commonly used with the system or sample type Ser.

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 Glial fibrillary acidic protein.alpha subunit Ab.IgG. It is commonly used with the system or sample type Ser.

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: IF

What it does not mean

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

Key facts

Glial fibrillary acidic protein alpha subunit IgG Ab [Titer] in Serum by Immunofluorescence
Glial fibrillary acidic protein.alpha subunit Ab.IgG
The staining pattern of glial fibrillary acidic protein IgG antibodies includes prominent filamentous staining in the subependymal zone and pia and subpial regions of the cerebral cortex and midbrain, with sparing of the cerebellum. [PMID30724768]
ABS; Aby; ACIF; Alfa; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; Dilution factor; Dilution Factor (Titer); FA; Fluorescent antibody; Fluoresent; GFAP; GFAP alpha; IFA; Immune fluorescence; Immune globulin G; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin G; Pituitary glycoproteins; Point in time; PR; Prot; Random; Serology; Serum; SmQn; SR; Stroke; TBI (Traumatic Brain Injury); Time Resolved Fluorescence; Titer; Titered; Titre; Traumatic Brain Injuries; TRF; Ttr

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

Glial fibrillary acidic protein alpha subunit IgG IF (S) [Titer]Glial fibrillary acidic protein alpha subunit IgG Ab [Titer] in Serum by ImmunofluorescenceGFAP alpha IgG Titr Ser IFGlial fibrillary acidic protein.alpha subunit Ab.IgGSEROGlial fibrillary acidic protein alpha subunit IgG antibody, BloodTitr

Frequently asked questions

Code details

Code93423-2
SystemLOINC
Display nameGlial fibrillary acidic protein alpha subunit IgG IF (S) [Titer]
DescriptionGlial fibrillary acidic protein.alpha subunit Ab.IgG
Short nameGFAP alpha IgG Titr Ser IF
ComponentGlial fibrillary acidic protein.alpha subunit Ab.IgG
PropertyTitr
TimingPt
System (specimen)Ser
ScaleSemiQn
MethodIF
ClassSERO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.67
Last changed2.75

Consumer names

Glial fibrillary acidic protein alpha subunit IgG antibody, Blood

Part names

Glial fibrillary acidic protein.alpha subunit Ab.IgGTitrPtSerSemiQnIFGlial fibrillary acidic protein alpha subunit IgGTiterPoint in time (spot)SerumImmunofluorescence (IF)

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 93423-2 | HealthAssure