LOINCActiveObservation

LOINC Code 51644-3: Megakaryocytic nuclei LM Ql (Bld)

51644-3 is a LOINC code used to identify Megakaryocytic nuclei LM 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 Megakaryocytic nuclei. 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 Megakaryocytic nuclei. 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: Microscopy.light

What it does not mean

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

Key facts

  • Megakaryocytic nuclei [Presence] in Blood by Light microscopy
  • Megakaryocytic nuclei
  • Blood; HEMATOLOGY/CELL COUNTS; LM; Megakar nuclei; Micro; Micros; Microscopic; Naked megakaryocyte nuclei; NMN; Ordinal; 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

Megakaryocytic nuclei LM Ql (Bld)Megakaryocytic nuclei [Presence] in Blood by Light microscopyMegakar nuclei Bld Ql SmearMegakaryocytic nucleiHEM/BCMegakaryocytic nuclei, BloodPrThr

Frequently asked questions

Code details

Code51644-3
SystemLOINC
Display nameMegakaryocytic nuclei LM Ql (Bld)
DescriptionMegakaryocytic nuclei
Short nameMegakar nuclei Bld Ql Smear
ComponentMegakaryocytic nuclei
PropertyPrThr
TimingPt
System (specimen)Bld
ScaleOrd
MethodMicroscopy.light
ClassHEM/BC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.24
Last changed2.56

Consumer names

Megakaryocytic nuclei, Blood

Part names

Megakaryocytic nucleiPrThrPtBldOrdMicroscopy.lightPresence or ThresholdPoint in time (spot)BloodLight microscopy

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 51644-3 | HealthAssure