LOINCActiveObservation

LOINC Code 55237-2: HBA2 gene c.427T>C Molgen Ql (Bld)

55237-2 is a LOINC code used to identify HBA2 gene c.427T>C Molgen Ql (Bld) 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 HBA2 gene.c.427T>C. It is commonly used with the system or sample type Bld.

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 HBA2 gene.c.427T>C. It is commonly used with the system or sample type Bld.

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: Molgen

What it does not mean

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

Key facts

HBA2 gene c.427T>C [Presence] in Blood by Molecular genetics method
HBA2 gene.c.427T>C
This assay detects the hemoglobin Constant Spring (CS) mutation located in the HBA2 gene on chromosome 16 at position p13.3.[NCBI ClinVar ID15624]
alpha-2 globin; Blood; Genetics; HB Constant Spring; HBA2 c.427T>C; HBA-T2; HBH; Hemoglobin, alpha 2; Heredity; Heritable; Inherited; Molecular genetics; Molecular pathology; MOLPATH; MOLPATH.MUTATIONS; Ordinal; PCR; Point in time; PR; QL; Qual; Qualitative; Random; Screen; WB; Whole blood

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

HBA2 gene c.427T>C Molgen Ql (Bld)HBA2 gene c.427T>C [Presence] in Blood by Molecular genetics methodHBA2 c.427T>C Bld QlHBA2 gene.c.427T>CMOLPATH.MUTHBA2 gene c.427T>C, BloodPrThr

Frequently asked questions

Code details

Code55237-2
SystemLOINC
Display nameHBA2 gene c.427T>C Molgen Ql (Bld)
DescriptionHBA2 gene.c.427T>C
Short nameHBA2 c.427T>C Bld Ql
ComponentHBA2 gene.c.427T>C
PropertyPrThr
TimingPt
System (specimen)Bld
ScaleOrd
MethodMolgen
ClassMOLPATH.MUT
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.27
Last changed2.66

Consumer names

HBA2 gene c.427T>C, Blood

Part names

HBA2 gene.c.427T>CPrThrPtBldOrdMolgenHBA2 gene c.427T>CPresence or ThresholdPoint in time (spot)BloodMolecular 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.

LOINC Code 55237-2 | HealthAssure