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 6428-7: H. capsulatum Ag IA Qn (S)

Name: LOINC Code 6428-7: H. capsulatum Ag IA Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:43.949Z

6428-7 is a LOINC code used to identify H. capsulatum Ag IA Qn (S) 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 Histoplasma capsulatum Ag. 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 Histoplasma capsulatum Ag. 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: IA

What it does not mean

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

Key facts

Histoplasma capsulatum Ag [Units/volume] in Serum by Immunoassay
Histoplasma capsulatum Ag
Antigen; Antigens; Arbitrary concentration; EIA; ELFA; ELISA; Enzyme immunoassay; H capsul; H capsulatum; H farciminosum; Histo; Histopl; Histoplasma farciminosum; Histoplasmos; Histoplasmosis; IAA; ID; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; SUDS; UniversalLabOrders

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

H. capsulatum Ag IA Qn (S)Histoplasma capsulatum Ag [Units/volume] in Serum by ImmunoassayH capsul Ag Ser IA-aCncHistoplasma capsulatum AgMICROHistoplasma capsulatum antigen, BloodACnc

Frequently asked questions

Code details

Code6428-7

SystemLOINC

Display nameH. capsulatum Ag IA Qn (S)

DescriptionHistoplasma capsulatum Ag

Short nameH capsul Ag Ser IA-aCnc

ComponentHistoplasma capsulatum Ag

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodIA

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0f

Last changed2.73

Consumer names

Histoplasma capsulatum antigen, Blood

Part names

Histoplasma capsulatum AgACncPtSerQnIAArbitrary ConcentrationPoint in time (spot)SerumImmunoassay

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.