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 19107-2: H. capsulatum Ag RIA Qn (S)

Name: LOINC Code 19107-2: H. capsulatum Ag RIA Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

19107-2 is a LOINC code used to identify H. capsulatum Ag RIA 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 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 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: RIA

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 Radioimmunoassay (RIA)
Histoplasma capsulatum Ag
Antigen; Antigens; Arbitrary concentration; H capsul; H capsulatum; H farciminosum; Histo; Histopl; Histoplasma farciminosum; Histoplasmos; Histoplasmosis; ID; Infectious Disease; InfectiousDisease; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; RADIOIMMUNOASSAY; Random; Serum; SR; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for H. capsulatum Ag RIA Qn (S) (19107-2)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

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

Frequently asked questions

Code details

Code19107-2

SystemLOINC

Display nameH. capsulatum Ag RIA Qn (S)

DescriptionHistoplasma capsulatum Ag

Short nameH capsul Ag Ser RIA-aCnc

ComponentHistoplasma capsulatum Ag

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodRIA

ClassMICRO

Example unitsarb U/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.73

Consumer names

Histoplasma capsulatum antigen, Blood

Part names

Histoplasma capsulatum AgACncPtSerQnRIAArbitrary ConcentrationPoint in time (spot)SerumRadioimmunoassay (RIA)

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.