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.

LOINCBoth

LOINC Code 38390-1: C. neoformans Ag Ql (CSF)

Name: LOINC Code 38390-1: C. neoformans Ag Ql (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:26.143Z

38390-1 is a LOINC code used to identify C. neoformans Ag Ql (CSF) 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 Cryptococcus neoformans Ag. It is commonly used with the system or sample type CSF.

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 Cryptococcus neoformans Ag. It is commonly used with the system or sample type CSF.

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: DEPRECATED
Order vs observation: Both

What it does not mean

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

Key facts

Deprecated Cryptococcus neoformans Ag [Presence] in Cerebral spinal fluid
Cryptococcus neoformans Ag
Antigen; Antigens; Arbitrary concentration; C neoform; C neoformans; Cerebral spinal fluid; Cerebrospinal Fl; Crypt; Crypto; Cryptococcal; Cryptococcosis; Cryptococcosus; ID; Infectious Disease; InfectiousDisease; Microbiology; Neuro; Neurology; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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

C. neoformans Ag Ql (CSF)Deprecated Cryptococcus neoformans Ag [Presence] in Cerebral spinal fluidDeprecated C neoform Ag CSF QlCryptococcus neoformans AgMICROCryptococcus neoformans antigen, Spinal fluidACnc

Frequently asked questions

Code details

Code38390-1

SystemLOINC

Display nameC. neoformans Ag Ql (CSF)

DescriptionCryptococcus neoformans Ag

Short nameDeprecated C neoform Ag CSF Ql

ComponentCryptococcus neoformans Ag

PropertyACnc

TimingPt

System (specimen)CSF

ScaleOrd

ClassMICRO

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.14

Last changed2.50

Consumer names

Cryptococcus neoformans antigen, Spinal fluid

Part names

Cryptococcus neoformans AgACncPtCSFOrdArbitrary ConcentrationPoint in time (spot)Cerebral spinal fluid

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.