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 50681-6: Thyroxine binding protein pattern Elph [Interp]

Name: LOINC Code 50681-6: Thyroxine binding protein pattern Elph [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:34.496Z

50681-6 is a LOINC code used to identify Thyroxine binding protein pattern Elph [Interp] 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 Thyroxine binding protein pattern. It is commonly used with the system or sample type 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 Thyroxine binding protein pattern. It is commonly used with the system or sample type 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: Observation
Method: Electrophoresis

What it does not mean

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

Key facts

Thyroxine binding protein pattern [Interpretation] in Serum or Plasma by Electrophoresis
Thyroxine binding protein pattern
Bind; Chemistry; Elec; Elect; Electr; Electro; Electrophhrs; Electrophrs; Elp; Elph; Endocrine; Endocrinology; Ep; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Levothyroxine; Levo-thyroxine; L-thyroxine; Nominal; Pl; Plasma; Plsm; Point in time; PR; Prot; Prot Pattern; Protein fractions; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SPEP; SR; T4; T-4; T4BP pattern; thyroid hormone; Thyrox; Thyroxin; Thyrx; Total T4; TT4

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

Thyroxine binding protein pattern Elph [Interp]Thyroxine binding protein pattern [Interpretation] in Serum or Plasma by ElectrophoresisT4BP pattern SerPl Elph-ImpThyroxine binding protein patternCHEMThyroxine binding protein pattern, BloodImp

Frequently asked questions

Code details

Code50681-6

SystemLOINC

Display nameThyroxine binding protein pattern Elph [Interp]

DescriptionThyroxine binding protein pattern

Short nameT4BP pattern SerPl Elph-Imp

ComponentThyroxine binding protein pattern

PropertyImp

TimingPt

System (specimen)Ser/Plas

ScaleNom

MethodElectrophoresis

ClassCHEM

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.26

Consumer names

Thyroxine binding protein pattern, Blood

Part names

Thyroxine binding protein patternImpPtSer/PlasNomElectrophoresisImpression/interpretation of studyPoint in time (spot)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.