LOINCActiveBoth

LOINC Code 100977-8: JC virus Ab Index IA Qn

100977-8 is a LOINC code used to identify JC virus Ab Index IA Qn 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 JC virus Ab Index. It is commonly used with the system or sample type Ser/Plas.

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 JC virus Ab Index. It is commonly used with the system or sample type Ser/Plas.

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

  • JC virus Ab Index in Serum or Plasma by Immunoassay
  • JC virus Ab Index
  • AI; Arbitrary concentration; EIA; ELFA; ELISA; Enzyme immunoassay; Human polyomavirus 2; IAA; JC Polyomavirus; JCPyV; JCV; John Cunningham Virus; MEIA; Microbiology; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; SUDS

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

JC virus Ab Index IA QnJC virus Ab Index in Serum or Plasma by ImmunoassayJC virus Ab Index SerPl IA-aCncJC virus Ab IndexMICROJC virus Ab Index, BloodACnc

Frequently asked questions

Code details

Code100977-8
SystemLOINC
Display nameJC virus Ab Index IA Qn
DescriptionJC virus Ab Index
Short nameJC virus Ab Index SerPl IA-aCnc
ComponentJC virus Ab Index
PropertyACnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
MethodIA
ClassMICRO
Example unitsIndex
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.74
Last changed2.75

Consumer names

JC virus Ab Index, Blood

Part names

JC virus Ab IndexACncPtSer/PlasQnIAArbitrary ConcentrationPoint in time (spot)Serum or PlasmaImmunoassay

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 100977-8 | HealthAssure