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 57773-4: Colorado tick fever virus IgG and IgM Nar (S) [Interp]

Name: LOINC Code 57773-4: Colorado tick fever virus IgG and IgM Nar (S) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.757Z

57773-4 is a LOINC code used to identify Colorado tick fever virus IgG and IgM Nar (S) [Interp] 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 Colorado tick fever virus Ab.IgG & IgM. It is commonly used with the system or sample type Ser.

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 Colorado tick fever virus Ab.IgG & IgM. It is commonly used with the system or sample type Ser.

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

Colorado tick fever virus IgG and IgM [Interpretation] in Serum Narrative
Colorado tick fever virus Ab.IgG & IgM
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; CTFV; ID; IgG+IgM; Immune globulin G; Immune globulin M; Immunoglobulin G; Immunoglobulin M; Impression; Impression/interpretation of study; Impressions; Infectious Disease; InfectiousDisease; Interp; Interpretation; Microbiology; Narrative; Point in time; Random; Report; Serum; 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

Colorado tick fever virus IgG and IgM Nar (S) [Interp]Colorado tick fever virus IgG and IgM [Interpretation] in Serum NarrativeCTFV IgG+IgM Ser-ImpColorado tick fever virus Ab.IgG & IgMMICROInterpretation of Colorado Tick Fever virus IgG and IgM antibodies test result, BloodImp

Frequently asked questions

Code details

Code57773-4

SystemLOINC

Display nameColorado tick fever virus IgG and IgM Nar (S) [Interp]

DescriptionColorado tick fever virus Ab.IgG & IgM

Short nameCTFV IgG+IgM Ser-Imp

ComponentColorado tick fever virus Ab.IgG & IgM

PropertyImp

TimingPt

System (specimen)Ser

ScaleNar

ClassMICRO

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.73

Consumer names

Interpretation of Colorado Tick Fever virus IgG and IgM antibodies test result, Blood

Part names

Colorado tick fever virus Ab.IgG & IgMImpPtSerNarColorado tick fever virus IgG and IgM AbImpression/interpretation of studyPoint in time (spot)Serum

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.