LOINCActiveObservation

LOINC Code 57451-7: CV2 Ab IB Ql (CSF)

57451-7 is a LOINC code used to identify CV2 Ab IB Ql (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 CV2 Ab. 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 CV2 Ab. 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: Observation
  • Method: IB

What it does not mean

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

Key facts

  • CV2 Ab [Presence] in Cerebral spinal fluid by Immunoblot
  • CV2 Ab
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Blt; Cerebral spinal fluid; Cerebrospinal Fl; Collapsin response mediator protein 5; Collapsin response mediator protein 5 Ab; CRMP5; CRMP-5; Immune blot; Immunobl; Immunoblot; Neuro; Neurology; Ordinal; Point in time; POP66; PR; QL; Qual; Qualitative; Random; RIBA; Screen; Serology; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; ULIP; WB; WBLOT; West blot; West blt; Western blot

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

CV2 Ab IB Ql (CSF)CV2 Ab [Presence] in Cerebral spinal fluid by ImmunoblotCV2 Ab CSF Ql IBCV2 AbSEROCV2 antibody, Spinal fluidPrThr

Frequently asked questions

Code details

Code57451-7
SystemLOINC
Display nameCV2 Ab IB Ql (CSF)
DescriptionCV2 Ab
Short nameCV2 Ab CSF Ql IB
ComponentCV2 Ab
PropertyPrThr
TimingPt
System (specimen)CSF
ScaleOrd
MethodIB
ClassSERO
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.29
Last changed2.58

Consumer names

CV2 antibody, Spinal fluid

Part names

CV2 AbPrThrPtCSFOrdIBPresence or ThresholdPoint in time (spot)Cerebral spinal fluidImmunoblot

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 57451-7 | HealthAssure