LOINCBoth

LOINC Code 10657-5: C. neoformans Ag IF Ql (Tiss)

10657-5 is a LOINC code used to identify C. neoformans Ag IF 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 Cryptococcus neoformans Ag. It is commonly used with the system or sample type Tiss.

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 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: DEPRECATED
  • Order vs observation: Both
  • Method: IF

What it does not mean

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

Key facts

  • Deprecated Cryptococcus neoformans Ag [Presence] in Tissue by Immunofluorescence
  • Cryptococcus neoformans Ag
  • ACIF; Anticomplement Immunofluorescence; Antigen; Antigens; Arbitrary concentration; C neoform; C neoformans; Crypt; Crypto; Cryptococcal; Cryptococcosis; Cryptococcosus; DFA; FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen; Time Resolved Fluorescence; Tissue; Tissue, unspecified; TRF

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 IF Ql (Tiss)Deprecated Cryptococcus neoformans Ag [Presence] in Tissue by ImmunofluorescenceDeprecated C neoform Ag Tiss Ql IFCryptococcus neoformans AgMICROCryptococcus neoformans antigen, TissueACnc

Frequently asked questions

Code details

Code10657-5
SystemLOINC
Display nameC. neoformans Ag IF Ql (Tiss)
DescriptionCryptococcus neoformans Ag
Short nameDeprecated C neoform Ag Tiss Ql IF
ComponentCryptococcus neoformans Ag
PropertyACnc
TimingPt
System (specimen)Tiss
ScaleOrd
MethodIF
ClassMICRO
StatusDEPRECATED
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0i
Last changed2.56

Consumer names

Cryptococcus neoformans antigen, Tissue

Part names

Cryptococcus neoformans AgACncPtTissOrdIFArbitrary ConcentrationPoint in time (spot)Tissue and SmearsImmunofluorescence (IF)

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.

LOINC Code 10657-5 | HealthAssure