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.

LOINCActiveOrder

LOINC Code 91684-1: H. capsulatum H and M Ab panel (CSF)

Name: LOINC Code 91684-1: H. capsulatum H and M Ab panel (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:21.442Z

91684-1 is a LOINC code used to identify H. capsulatum H and M Ab panel (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 Histoplasma capsulatum H & M Ab panel. 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 Histoplasma capsulatum H & M Ab panel. 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: ACTIVE
Order vs observation: Order
Panel type: Panel

What it does not mean

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

Key facts

Histoplasma capsulatum H and M Ab panel - Cerebral spinal fluid

Histoplasma capsulatum H & M Ab panel

Immunodiffusion (ID) and complement fixation (CF) are used to detect antibodies to Histoplasma capsulatum in spinal fluid. The ID assay detects the presence of antibodies to the H. capsulatum M and H precipitin bands. The M band is present during acute infection, but can also be present during chronic infection and be detectable for months or years after the infection has resolved. The H band is present during chronic or severe acute infections. The M band is usually also present when the H band is detected. [PMID17223625]

Cerebral spinal fluid; Cerebrospinal Fl; H capsul; H capsul H; H capsulatum; H capsulatum H+M Ab panel; H farciminosum; Histo; Histopl; Histoplasma farciminosum; Histoplasmos; Histoplasmosis; Microbiology; MNSs Blood Group System; Pan; PANEL.MICROBIOLOGY; Panl; Pnl; Point in time; Random; 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

H. capsulatum H and M Ab panel (CSF)Histoplasma capsulatum H and M Ab panel - Cerebral spinal fluidH capsulatum H+M Ab panel CSFHistoplasma capsulatum H & M Ab panelPANEL.MICROHistoplasma capsulatum H and M Antibody panel, Spinal fluid-

Frequently asked questions

Code details

Code91684-1

SystemLOINC

Display nameH. capsulatum H and M Ab panel (CSF)

DescriptionHistoplasma capsulatum H & M Ab panel

Short nameH capsulatum H+M Ab panel CSF

ComponentHistoplasma capsulatum H & M Ab panel

Property-

TimingPt

System (specimen)CSF

Scale-

ClassPANEL.MICRO

StatusACTIVE

Order/ObservationOrder

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.66

Last changed2.66

Consumer names

Histoplasma capsulatum H and M Antibody panel, Spinal fluid

Part names

Histoplasma capsulatum H & M Ab panel-PtCSFHistoplasma capsulatum H and M Ab panelPoint 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.