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 33831-9: Lymphoblasts/Leukocytes Manual cnt (Bld)

Name: LOINC Code 33831-9: Lymphoblasts/Leukocytes Manual cnt (Bld)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

33831-9 is a LOINC code used to identify Lymphoblasts/Leukocytes Manual cnt (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 Lymphoblasts/Leukocytes. It is commonly used with the system or sample type Bld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Lymphoblasts/Leukocytes. 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: Manual count

What it does not mean

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

Key facts

Lymphoblasts/Leukocytes in Blood by Manual count
Lymphoblasts/Leukocytes
Blood; HEMATOLOGY/CELL COUNTS; Leuc; Leuk; Leukocyte; Lkcs; Lymphoblast; Manl; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; WB; WBC; WBCs; White blood cell; White blood cells; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Lymphoblasts/Leukocytes Manual cnt (Bld) (33831-9)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Lymphoblasts/Leukocytes Manual cnt (Bld)Lymphoblasts/Leukocytes in Blood by Manual countLymphoblasts NFr Bld ManualLymphoblasts/LeukocytesHEM/BCLymphoblasts/White Blood Cells, BloodNFr

Frequently asked questions

Code details

Code33831-9

SystemLOINC

Display nameLymphoblasts/Leukocytes Manual cnt (Bld)

DescriptionLymphoblasts/Leukocytes

Short nameLymphoblasts NFr Bld Manual

ComponentLymphoblasts/Leukocytes

PropertyNFr

TimingPt

System (specimen)Bld

ScaleQn

MethodManual count

ClassHEM/BC

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.09

Last changed2.79

Consumer names

Lymphoblasts/White Blood Cells, Blood

Part names

Lymphoblasts/LeukocytesNFrPtBldQnManual countNumber FractionPoint in time (spot)Blood

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.