LOINCActiveObservation

LOINC Code 74229-6: Megakaryopoiesis assessment Nar (BM)

74229-6 is a LOINC code used to identify Megakaryopoiesis assessment Nar (BM) 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 Megakaryopoiesis assessment. It is commonly used with the system or sample type Bone mar.

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 Megakaryopoiesis assessment. It is commonly used with the system or sample type Bone mar.

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

  • Megakaryopoiesis assessment in Bone marrow Narrative
  • Megakaryopoiesis assessment
  • Narrative text findings of megakaryopoiesis in the bone marrow. Text may state if lymphocytes are increased or decreased as as well as other descriptive findings (e.g. if atypical lymphoid aggregates are identified).
  • BM; BON; Bone marrow; Finding; Findings; HEMATOLOGY/CELL COUNTS; MAR; Marrow (bone); minimal angle of resolution; Minimum angle of resolution; Narrative; Point in time; Random; Report

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

Megakaryopoiesis assessment Nar (BM)Megakaryopoiesis assessment in Bone marrow NarrativeMegakaryopoiesis MarMegakaryopoiesis assessmentHEM/BCMegakaryopoiesis assessment, Bone marrowFind

Frequently asked questions

Code details

Code74229-6
SystemLOINC
Display nameMegakaryopoiesis assessment Nar (BM)
DescriptionMegakaryopoiesis assessment
Short nameMegakaryopoiesis Mar
ComponentMegakaryopoiesis assessment
PropertyFind
TimingPt
System (specimen)Bone mar
ScaleNar
ClassHEM/BC
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.46
Last changed2.46

Consumer names

Megakaryopoiesis assessment, Bone marrow

Part names

Megakaryopoiesis assessmentFindPtBone marNarFindingPoint in time (spot)Bone marrow

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 74229-6 | HealthAssure