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.

LOINCActiveObservation

LOINC Code 101201-2: MeV IgG index Qn (S+CSF)

Name: LOINC Code 101201-2: MeV IgG index Qn (S+CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:17.027Z

101201-2 is a LOINC code used to identify MeV IgG index Qn (S+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 Measles virus Ab.IgG index. It is commonly used with the system or sample type Ser+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 Measles virus Ab.IgG index. It is commonly used with the system or sample type Ser+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: Observation

What it does not mean

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

Key facts

Measles virus IgG Ab index [Units/volume] in Serum and CSF
Measles virus Ab.IgG index
ABS; Aby; AI; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Both serum and cerebrospinal fluid; Cerebral spinal fluid; Cerebrospinal Fl; Immune globulin G; Immunoglobulin G; MeV; Microbiology; Msls; Point in time; QNT; Quan; Quant; Quantitative; Random; Rubeola; Serum; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; 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.

Common synonyms

MeV IgG index Qn (S+CSF)Measles virus IgG Ab index [Units/volume] in Serum and CSFMeV IgG Index Ser+CSF-aCncMeasles virus Ab.IgG indexMICROMeasles virus IgG index, Serum+Cerebrospinal fluidACnc

Frequently asked questions

Code details

Code101201-2

SystemLOINC

Display nameMeV IgG index Qn (S+CSF)

DescriptionMeasles virus Ab.IgG index

Short nameMeV IgG Index Ser+CSF-aCnc

ComponentMeasles virus Ab.IgG index

PropertyACnc

TimingPt

System (specimen)Ser+CSF

ScaleQn

ClassMICRO

Example unitsindex value

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.74

Last changed2.75

Consumer names

Measles virus IgG index, Serum+Cerebrospinal fluid

Part names

Measles virus Ab.IgG indexACncPtSer+CSFQnArbitrary ConcentrationPoint in time (spot)Serum and CSF

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.