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 4553-4: Hemoglobin A2 Elph pH 6.3 (Bld) [Mass fraction]

Name: LOINC Code 4553-4: Hemoglobin A2 Elph pH 6.3 (Bld) [Mass fraction]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:31.115Z

4553-4 is a LOINC code used to identify Hemoglobin A2 Elph pH 6.3 (Bld) [Mass fraction] 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 Hemoglobin A2/Hemoglobin.total. 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 Hemoglobin A2/Hemoglobin.total. 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: Electrophoresis pH 6.3

What it does not mean

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

Key facts

Hemoglobin A2/Hemoglobin.total in Blood by Electrophoresis acid (pH 6.3)
Hemoglobin A2/Hemoglobin.total
Blood; Elec; Elect; Electr; Electro; Electrophhrs; Electrophrs; Elp; Elph; Elph Acid; Ep; Haemoglobin; Hb; HEMATOLOGY/CELL COUNTS; Hgb; Hgb A2; Mass Fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Tot; Totl; 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

Hemoglobin A2 Elph pH 6.3 (Bld) [Mass fraction]Hemoglobin A2/Hemoglobin.total in Blood by Electrophoresis acid (pH 6.3)Hgb A2 MFr Bld Elph AcidHemoglobin A2/Hemoglobin.totalHEM/BCHemoglobin A2/Total Hgb, BloodMFr

Frequently asked questions

Code details

Code4553-4

SystemLOINC

Display nameHemoglobin A2 Elph pH 6.3 (Bld) [Mass fraction]

DescriptionHemoglobin A2/Hemoglobin.total

Short nameHgb A2 MFr Bld Elph Acid

ComponentHemoglobin A2/Hemoglobin.total

PropertyMFr

TimingPt

System (specimen)Bld

ScaleQn

MethodElectrophoresis pH 6.3

ClassHEM/BC

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.70

Consumer names

Hemoglobin A2/Total Hgb, Blood

Part names

Hemoglobin A2/Hemoglobin.totalMFrPtBldQnElectrophoresis pH 6.3Mass fractionPoint in time (spot)BloodElectrophoresis acid (pH 6.3)

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.