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.

LOINCBoth

LOINC Code 21648-1: CBS gene p.I278T Molgen Ql (Bld/Tiss)

Name: LOINC Code 21648-1: CBS gene p.I278T Molgen Ql (Bld/Tiss)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:29.463Z

21648-1 is a LOINC code used to identify CBS gene p.I278T Molgen Ql (Bld/Tiss) 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 CBS gene.p.I278T. It is commonly used with the system or sample type Bld/Tiss.

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 CBS gene.p.I278T. It is commonly used with the system or sample type Bld/Tiss.

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: DEPRECATED
Order vs observation: Both
Method: Molgen

What it does not mean

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

Key facts

Deprecated CBS gene p.I278T [Presence] in Blood or Tissue by Molecular genetics method
CBS gene.p.I278T
Arbitrary; Blood; CBS p.I278T; cystathionine-beta-synthase; Genetics; Heredity; Heritable; HIP4; Ile278Thr; Inherited; Molecular genetics; Molecular pathology; MOLPATH; MOLPATH.MUTATIONS; Ordinal; P prime; PCR; Point in time; Pyridoxine responsive homocystinuria; QL; Qual; Qualitative; Random; Screen; Tissue; Tissue, unspecified; WB; Whole blood; Whole blood or Tissue

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

CBS gene p.I278T Molgen Ql (Bld/Tiss)Deprecated CBS gene p.I278T [Presence] in Blood or Tissue by Molecular genetics methodDeprecated CBS p.I278T Bld/T QlCBS gene.p.I278TMOLPATH.MUTCBS gene p.I278T, Blood or tissue specimenArb

Frequently asked questions

Code details

Code21648-1

SystemLOINC

Display nameCBS gene p.I278T Molgen Ql (Bld/Tiss)

DescriptionCBS gene.p.I278T

Short nameDeprecated CBS p.I278T Bld/T Ql

ComponentCBS gene.p.I278T

PropertyArb

TimingPt

System (specimen)Bld/Tiss

ScaleOrd

MethodMolgen

ClassMOLPATH.MUT

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.40

Consumer names

CBS gene p.I278T, Blood or tissue specimen

Part names

CBS gene.p.I278TArbPtBld/TissOrdMolgenCBS gene p.I278TArbitraryPoint in time (spot)Blood or TissueMolecular genetics

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.