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.

LOINCActiveBoth

LOINC Code 33558-8: Creatinine renal clearance Unsp time (U+S/P) [Vol/Time]

Name: LOINC Code 33558-8: Creatinine renal clearance Unsp time (U+S/P) [Vol/Time]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:20.069Z

33558-8 is a LOINC code used to identify Creatinine renal clearance Unsp time (U+S/P) [Vol/Time] 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 Creatinine renal clearance. It is commonly used with the system or sample type Urine+Ser/Plas.

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

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: Both

What it does not mean

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

Key facts

Creatinine renal clearance in Urine and Serum or Plasma collected for unspecified duration
Creatinine renal clearance
?Tm; Chemistry; Cl; Clear; Clearanc; Clearances; Clr; CR; Crea; Creat; Flow; Kidney; Nephrology; Pl; Plasma; Plsm; QNT; Quan; Quant; Quantitative; Renal; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; UA; UCr; UR; Ur+SerPl; Urn; Volume rate; vRate

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

Creatinine renal clearance Unsp time (U+S/P) [Vol/Time]Creatinine renal clearance in Urine and Serum or Plasma collected for unspecified durationCreat Cl ?Tm Ur+SerPl-vRateCreatinine renal clearanceCHEMCreatinine renal clearance, Urine+BloodVRat

Frequently asked questions

Code details

Code33558-8

SystemLOINC

Display nameCreatinine renal clearance Unsp time (U+S/P) [Vol/Time]

DescriptionCreatinine renal clearance

Short nameCreat Cl ?Tm Ur+SerPl-vRate

ComponentCreatinine renal clearance

PropertyVRat

TimingXXX

System (specimen)Urine+Ser/Plas

ScaleQn

ClassCHEM

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.09

Last changed2.73

Consumer names

Creatinine renal clearance, Urine+Blood

Part names

Creatinine renal clearanceVRatXXXUrine+Ser/PlasQnVolume RateUnspecifiedUrine and Serum or Plasma

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.