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 20497-4: H. capsulatum mycelial phase Ab CF Qn (S)

Name: LOINC Code 20497-4: H. capsulatum mycelial phase Ab CF Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

20497-4 is a LOINC code used to identify H. capsulatum mycelial phase Ab CF 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 mycelial phase Ab. 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 mycelial phase Ab. 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: Comp fix

What it does not mean

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

Key facts

Histoplasma capsulatum mycelial phase Ab [Units/volume] in Serum by Complement fixation
Histoplasma capsulatum mycelial phase Ab
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; CF; Comp fixation; Compfix; Complement fixation; H capsul; H capsul Myc; H capsulatum; H farciminosum; Histo; Histopl; Histoplasma farciminosum; Histoplasmin; Histoplasmos; Histoplasmosis; ID; Infectious Disease; InfectiousDisease; Microbiology; Mycel; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR

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 mycelial phase Ab CF Qn (S) (20497-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

H. capsulatum mycelial phase Ab CF Qn (S)Histoplasma capsulatum mycelial phase Ab [Units/volume] in Serum by Complement fixationH capsul Myc Ab Ser CF-aCncHistoplasma capsulatum mycelial phase AbMICROHistoplasma capsulatum mycelial phase antibody, BloodACnc

Frequently asked questions

Code details

Code20497-4

SystemLOINC

Display nameH. capsulatum mycelial phase Ab CF Qn (S)

DescriptionHistoplasma capsulatum mycelial phase Ab

Short nameH capsul Myc Ab Ser CF-aCnc

ComponentHistoplasma capsulatum mycelial phase Ab

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodComp fix

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.69

Consumer names

Histoplasma capsulatum mycelial phase antibody, Blood

Part names

Histoplasma capsulatum mycelial phase AbACncPtSerQnComp fixArbitrary ConcentrationPoint in time (spot)SerumComplement fixation

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.