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 104639-0: Time above range, very high Calc (Reporting Period Interstitial fluid)

Name: LOINC Code 104639-0: Time above range, very high Calc (Reporting Period Interstitial fluid)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:19.128Z

104639-0 is a LOINC code used to identify Time above range, very 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, very 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, very 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, very high in Reporting Period Interstitial fluid by calculation
Time above range, very high
Calc; Calculation; CGM hyper; Chemistry; Interstitial fld; QNT; Quan; Quant; Quantitative; Report period; Rnge

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, very high Calc (Reporting Period Interstitial fluid)Time above range, very high in Reporting Period Interstitial fluid by calculationCGM v high RptPrd Intrsttl fld CalTime above range, very highCHEMTime above range, very high, Interstitial fluidTimeFr

Frequently asked questions

Code details

Code104639-0

SystemLOINC

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

DescriptionTime above range, very high

Short nameCGM v high RptPrd Intrsttl fld Cal

ComponentTime above range, very 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, very high, Interstitial fluid

Part names

Time above range, very 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.