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 30438-6: Monocytes+Macrophages/Leukocytes (Syn fld)

Name: LOINC Code 30438-6: Monocytes+Macrophages/Leukocytes (Syn fld)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:16.075Z

30438-6 is a LOINC code used to identify Monocytes+Macrophages/Leukocytes (Syn fld) 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 Monocytes+Macrophages/Leukocytes. It is commonly used with the system or sample type Synv fld.

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 Monocytes+Macrophages/Leukocytes. It is commonly used with the system or sample type Synv fld.

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

What it does not mean

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

Key facts

Monocytes+Macrophages/Leukocytes in Synovial fluid
Monocytes+Macrophages/Leukocytes
HEMATOLOGY/CELL COUNTS; Joint aspirate; Joint fld; Joint flu; Joint fluid; Leuc; Leuk; Leukocyte; Lkcs; Macrop; Macrophage; Macros; Macrphg; Mono; Monocyte; Monos; Monos+Macros; Number Fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; SF; SNV; Syn; Syn fl; Synov; Synovial fluid; WBC; WBCs; White blood cell; White blood cells

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

Monocytes+Macrophages/Leukocytes (Syn fld)Monocytes+Macrophages/Leukocytes in Synovial fluidMonos+Macros NFr SnvMonocytes+Macrophages/LeukocytesHEM/BCMonocytes+Macrophages/White Blood Cells, Synovial fluidNFr

Frequently asked questions

Code details

Code30438-6

SystemLOINC

Display nameMonocytes+Macrophages/Leukocytes (Syn fld)

DescriptionMonocytes+Macrophages/Leukocytes

Short nameMonos+Macros NFr Snv

ComponentMonocytes+Macrophages/Leukocytes

PropertyNFr

TimingPt

System (specimen)Synv fld

ScaleQn

ClassHEM/BC

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.04

Last changed2.79

Consumer names

Monocytes+Macrophages/White Blood Cells, Synovial fluid

Part names

Monocytes+Macrophages/leukocytesNFrPtSynv fldQnNumber FractionPoint in time (spot)Synovial fluid

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.