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 80618-2: ZIKV IgM IA Qn (CSF)

Name: LOINC Code 80618-2: ZIKV IgM IA Qn (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:03.793Z

80618-2 is a LOINC code used to identify ZIKV IgM IA Qn (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 Zika virus Ab.IgM. 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 Zika virus Ab.IgM. 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: Both
Method: IA

What it does not mean

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

Key facts

Zika virus IgM Ab [Units/volume] in Cerebral spinal fluid by Immunoassay

Zika virus Ab.IgM

Quantitative analysis of Zika virus IgM antibodies in cerebral spinal fluid (CSF) specimens by immunoassay-based methods. Similar to most EIA tests, results are reported as a ratio of optical densities. Zika virus IgM antibodies become detectable 4-8 days after the onset of symptoms and persist for months. Since IgM does not normally cross the blood-brain barrier, detection of Zika virus IgM in CSF implies CNS infection. Serological cross-reactivity is strong between Zika and other flaviviruses, especially Dengue virus. Therefore, positive results for this test are presumptive and should be confirmed by neutralizing antibody testing [LOINC80621-6]. Negative results for this test on a sample taken during the first week of illness does not rule out infection and the test should be repeated on a convalescent sample.

ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; ID; Immune globulin M; Immunoglobulin M; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Neuro; Neurology; Point in time; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; SUDS; ZIKV

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

ZIKV IgM IA Qn (CSF)Zika virus IgM Ab [Units/volume] in Cerebral spinal fluid by ImmunoassayZIKV IgM CSF IA-aCncZika virus Ab.IgMMICROZika virus IgM antibody, Spinal fluidACnc

Frequently asked questions

Code details

Code80618-2

SystemLOINC

Display nameZIKV IgM IA Qn (CSF)

DescriptionZika virus Ab.IgM

Short nameZIKV IgM CSF IA-aCnc

ComponentZika virus Ab.IgM

PropertyACnc

TimingPt

System (specimen)CSF

ScaleQn

MethodIA

ClassMICRO

Example unitsEIA index

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.56

Last changed2.56

Consumer names

Zika virus IgM antibody, Spinal fluid

Part names

Zika virus Ab.IgMACncPtCSFQnIAZika virus IgMArbitrary ConcentrationPoint in time (spot)Cerebral spinal fluidImmunoassay

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.