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.

LOINCActiveOrder

LOINC Code 77166-7: Chlamydia sp IgG and IgM panel IF (S) [Titer]

Name: LOINC Code 77166-7: Chlamydia sp IgG and IgM panel IF (S) [Titer]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:57.647Z

77166-7 is a LOINC code used to identify Chlamydia sp IgG and IgM panel IF (S) [Titer] 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 Chlamydia sp Ab.IgG & IgM panel. 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 Chlamydia sp Ab.IgG & IgM panel. 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: Order
Panel type: Panel
Method: IF

What it does not mean

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

Key facts

Chlamydia sp IgG and IgM panel [Titer] - Serum by Immunofluorescence
Chlamydia sp Ab.IgG & IgM panel
This Chlamydia panel includes serum immunofluorescence IgG and IgM antibody titer assays for the detection of C. pneumonia, C. trachomatis, and C. psittaci.
ACIF; Anticomplement Immunofluorescence; Chlam; Chlamid; Chlamydia sp IgG+IgM Pnl; Dilution factor; Dilution Factor (Titer); FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immune globulin G; Immune globulin M; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin G; Immunoglobulin M; Infectious Disease; InfectiousDisease; Microbiology; Pan; PANEL.MICROBIOLOGY; Panl; Pnl; Point in time; Random; Serum; SmQn; species; spp; SR; Time Resolved Fluorescence; Titer; Titered; Titre; TRF; Ttr

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

Chlamydia sp IgG and IgM panel IF (S) [Titer]Chlamydia sp IgG and IgM panel [Titer] - Serum by ImmunofluorescenceChlamydia sp IgG+IgM Pnl Titr Ser IFChlamydia sp Ab.IgG & IgM panelPANEL.MICROChlamydia species IgG and IgM panel, BloodTitr

Frequently asked questions

Code details

Code77166-7

SystemLOINC

Display nameChlamydia sp IgG and IgM panel IF (S) [Titer]

DescriptionChlamydia sp Ab.IgG & IgM panel

Short nameChlamydia sp IgG+IgM Pnl Titr Ser IF

ComponentChlamydia sp Ab.IgG & IgM panel

PropertyTitr

TimingPt

System (specimen)Ser

ScaleSemiQn

MethodIF

ClassPANEL.MICRO

StatusACTIVE

Order/ObservationOrder

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.52

Last changed2.75

Consumer names

Chlamydia species IgG and IgM panel, Blood

Part names

Chlamydia sp Ab.IgG & IgM panelTitrPtSerSemiQnIFChlamydia sp IgG and IgM panelTiterPoint in time (spot)SerumImmunofluorescence (IF)

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.