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.

LOINC

LOINC Code 66615-6: Estimated or measured glomerular filtration rate less than 50 percent [Reported]

Name: LOINC Code 66615-6: Estimated or measured glomerular filtration rate less than 50 percent [Reported]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:46.210Z

66615-6 is a LOINC code used to identify Estimated or measured glomerular filtration rate less than 50 percent [Reported] 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 Estimated or measured glomerular filtration rate less than 50 percent. It is commonly used with the system or sample type ^Patient.

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 Estimated or measured glomerular filtration rate less than 50 percent. It is commonly used with the system or sample type ^Patient.

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: TRIAL
Method: Reported

What it does not mean

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

Key facts

Estimated or measured glomerular filtration rate less than 50 percent [Reported]
Estimated or measured glomerular filtration rate less than 50 percent
GFR; Glom; History; Ordinal; PhenX; Point in time; QL; Qual; Qualitative; Random; Renal GFR <50%; Screen

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

Estimated or measured glomerular filtration rate less than 50 percent [Reported]Renal GFR <50% ReportedEstimated or measured glomerular filtration rate less than 50 percentPHENXHxPt^Patient

Frequently asked questions

Code details

Code66615-6

SystemLOINC

Display nameEstimated or measured glomerular filtration rate less than 50 percent [Reported]

DescriptionEstimated or measured glomerular filtration rate less than 50 percent

Short nameRenal GFR <50% Reported

ComponentEstimated or measured glomerular filtration rate less than 50 percent

PropertyHx

TimingPt

System (specimen)^Patient

ScaleOrd

MethodReported

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.38

Last changed2.65

Part names

Estimated or measured glomerular filtration rate less than 50 percentHxPt^PatientOrdReportedHistoryPoint in time (spot)

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.