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.

LOINCObservation

LOINC Code 30463-4: Promyelocytes/100 WBC (Bld)

Name: LOINC Code 30463-4: Promyelocytes/100 WBC (Bld)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:16.075Z

30463-4 is a LOINC code used to identify Promyelocytes/100 WBC (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 Promyelocytes/100 leukocytes. 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 Promyelocytes/100 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: DEPRECATED
Order vs observation: Observation

What it does not mean

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

Key facts

Deprecated Promyelocytes/100 leukocytes in Blood
Promyelocytes/100 leukocytes
100WBC; Blood; HEMATOLOGY/CELL COUNTS; Leuc; Leuk; Leukocyte; Lkcs; Number fraction; Percent; Point in time; Pro myelos; Progranulocyte; Progranulocytes; Promyel; Promyelocyte; 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.

Common synonyms

Promyelocytes/100 WBC (Bld)Deprecated Promyelocytes/100 leukocytes in BloodDeprecated Promyelocytes Fr BldPromyelocytes/100 leukocytesHEM/BCPromyelocytes per 100 white blood cells, BloodNFr

Frequently asked questions

Code details

Code30463-4

SystemLOINC

Display namePromyelocytes/100 WBC (Bld)

DescriptionPromyelocytes/100 leukocytes

Short nameDeprecated Promyelocytes Fr Bld

ComponentPromyelocytes/100 leukocytes

PropertyNFr

TimingPt

System (specimen)Bld

ScaleQn

ClassHEM/BC

Example units%

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.04

Last changed2.70

Consumer names

Promyelocytes per 100 white blood cells, Blood

Part names

Promyelocytes/100 leukocytesNFrPtBldQnNumber 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.