LOINCActiveBoth

LOINC Code 78962-8: IgG clearance/Transferrin clearance (U+S/P) [Ratio]

78962-8 is a LOINC code used to identify IgG clearance/Transferrin clearance (U+S/P) [Ratio] 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 IgG clearance/Transferrin 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 IgG clearance/Transferrin 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

IgG clearance/Transferrin clearance [Ratio] in Urine and Serum or Plasma
IgG clearance/Transferrin clearance
The ratio of IgG to transferrin clearances, the selectivity index, is useful in the diagnosis and management of proteinuria. Both IgG and transferrin levels are measured in serum and urine and the selectivity index (SI) is calculated according to the formula of Cameron and Blandford where SI = (uIgG/sIgG)/(uTf/sTf) or (uIgG/sIgG * sTf/uTf).[PMID4161419] An index of below 0.1 is indicative of highly selective proteinuria.[PMID: 11012907]
Chemistry; Cl; Clear; Clearanc; Clearances; Clr; Immune globulin G; Immunoglobulin G; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Ratios; Rto; SerP; SerPl; SerPlas; Serum; Serum or plasma; Siderophilin; SR; Tf; Transf clear; Trf; TRFRN; UA; UR; Ur+SerPl; Urn

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

IgG clearance/Transferrin clearance (U+S/P) [Ratio]IgG clearance/Transferrin clearance [Ratio] in Urine and Serum or PlasmaIgG/Transf clear Ur+SerPl-RtoIgG clearance/Transferrin clearanceCHEMIgG Clearance/Transferrin Clearance, Urine+Serum/PlasmaRatio

Frequently asked questions

Code details

Code78962-8
SystemLOINC
Display nameIgG clearance/Transferrin clearance (U+S/P) [Ratio]
DescriptionIgG clearance/Transferrin clearance
Short nameIgG/Transf clear Ur+SerPl-Rto
ComponentIgG clearance/Transferrin clearance
PropertyRatio
TimingPt
System (specimen)Urine+Ser/Plas
ScaleQn
ClassCHEM
Example unitsratio
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.54
Last changed2.54

Consumer names

IgG Clearance/Transferrin Clearance, Urine+Serum/Plasma

Part names

IgG clearance/Transferrin clearanceRatioPtUrine+Ser/PlasQnPoint in time (spot)Urine 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.

LOINC Code 78962-8 | HealthAssure