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 101921-5: Iohexol renal clearance (S/P/U) [Vol rate/Area]

Name: LOINC Code 101921-5: Iohexol renal clearance (S/P/U) [Vol rate/Area]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:17.451Z

101921-5 is a LOINC code used to identify Iohexol renal clearance (S/P/U) [Vol rate/Area] 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 Iohexol renal clearance. It is commonly used with the system or sample type Ser/Plas/Urine.

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 Iohexol renal clearance. It is commonly used with the system or sample type Ser/Plas/Urine.

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

Iohexol renal clearance in Serum or Plasma or Urine
Iohexol renal clearance
Cl; Clear; Clearanc; Clearances; Clr; DRUG/TOXICOLOGY; Drugs; Kidney; Omnipaque; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Ser/Plas/Urn; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; UA; UR; Urn; Volume rate/area; Volume Rate/Ratio

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

Iohexol renal clearance (S/P/U) [Vol rate/Area]Iohexol renal clearance in Serum or Plasma or UrineIohexol Cl Ser/Plas/Urn-ArVRatIohexol renal clearanceDRUG/TOXIohexol renal clearance, Blood or urineArVRat

Frequently asked questions

Code details

Code101921-5

SystemLOINC

Display nameIohexol renal clearance (S/P/U) [Vol rate/Area]

DescriptionIohexol renal clearance

Short nameIohexol Cl Ser/Plas/Urn-ArVRat

ComponentIohexol renal clearance

PropertyArVRat

TimingPt

System (specimen)Ser/Plas/Urine

ScaleQn

ClassDRUG/TOX

Example unitsmL/min/1.73 sq m

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.75

Last changed2.75

Consumer names

Iohexol renal clearance, Blood or urine

Part names

Iohexol renal clearanceArVRatPtSer/Plas/UrineQnVolume Rate/AreaPoint in time (spot)Serum or Plasma or Urine

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.