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 104640-8: Time above range, high Calc (Reporting Period Interstitial fluid)

Name: LOINC Code 104640-8: Time above range, high Calc (Reporting Period Interstitial fluid)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:19.128Z

104640-8 is a LOINC code used to identify Time above range, high Calc (Reporting Period Interstitial fluid) 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 Time above range, high. It is commonly used with the system or sample type Interstitial fluid.

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 Time above range, high. It is commonly used with the system or sample type Interstitial fluid.

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: Calculated

What it does not mean

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

Key facts

Time above range, high in Reporting Period Interstitial fluid by calculation
Time above range, high
Calc; Calculation; Chemistry; Interstitial fld; QNT; Quan; Quant; Quantitative; Report period; Rnge; Time high hyper

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

Time above range, high Calc (Reporting Period Interstitial fluid)Time above range, high in Reporting Period Interstitial fluid by calculationTime high hyper RptPeriod Interest fldTime above range, highCHEMTime above range, high, Interstitial fluidTimeFr

Frequently asked questions

Code details

Code104640-8

SystemLOINC

Display nameTime above range, high Calc (Reporting Period Interstitial fluid)

DescriptionTime above range, high

Short nameTime high hyper RptPeriod Interest fld

ComponentTime above range, high

PropertyTimeFr

TimingRptPeriod

System (specimen)Interstitial fluid

ScaleQn

MethodCalculated

ClassCHEM

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.79

Last changed2.79

Consumer names

Time above range, high, Interstitial fluid

Part names

Time above range, highTimeFrRptPeriodInterstitial fluidQnCalculatedTime FractionReporting Period

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.