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LOINC Code 10462-0: Alpha 1 antitrypsin Ag Immune stain Ql (Tiss)

10462-0 is a LOINC code used to identify Alpha 1 antitrypsin Ag Immune stain Ql (Tiss) 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 Alpha 1 antitrypsin Ag. It is commonly used with the system or sample type Tiss.

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 Alpha 1 antitrypsin Ag. It is commonly used with the system or sample type Tiss.

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: Immune stain

What it does not mean

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

Key facts

  • Alpha 1 antitrypsin Ag [Presence] in Tissue by Immune stain
  • Alpha 1 antitrypsin Ag
  • A1; A1A; A1AT; A-1-AT; A1-AT; AAT; Alfa; Alpha-1-antitrypsin.total; Alpha-1-protease inhibitor; Alpha-1-proteinase inhibitor; Alpha-1-trypsin inhibitor; Antigen; Antigens; Genetics; Hepatology; Heredity; Heritable; i; IHC; Imm; Immunohistochemical stain; Immunostain; ImStn; Imun; Imune; Inherited; Liver; Lung; Ordinal; Pathology; Point in time; PR; Pulmonary; Pulmonology; Ql; Qual; Qualitative; Random; Respiratory; Screen; St; Stains; Stn; Tissue; Tissue, unspecified

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

Alpha 1 antitrypsin Ag Immune stain Ql (Tiss)Alpha 1 antitrypsin Ag [Presence] in Tissue by Immune stainA1AT Ag Tiss Ql ImStnAlpha 1 antitrypsin AgPATHAlpha 1 antitrypsin antigen, TissuePrThr

Frequently asked questions

Code details

Code10462-0
SystemLOINC
Display nameAlpha 1 antitrypsin Ag Immune stain Ql (Tiss)
DescriptionAlpha 1 antitrypsin Ag
Short nameA1AT Ag Tiss Ql ImStn
ComponentAlpha 1 antitrypsin Ag
PropertyPrThr
TimingPt
System (specimen)Tiss
ScaleOrd
MethodImmune stain
ClassPATH
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0i
Last changed2.73

Consumer names

Alpha 1 antitrypsin antigen, Tissue

Part names

Alpha 1 antitrypsin AgPrThrPtTissOrdImmune stainPresence or ThresholdPoint in time (spot)Tissue and Smears

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.