LOINC Code 51629-4: Macroblasts/Cells Manual cnt (BM)

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 Macroblasts/Cells. 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
• Method: Manual count

What it does not mean

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

Key facts

• Macroblasts/cells in Bone marrow by Manual count
• Macroblasts/Cells
• The classification of erythroid precursors is not well standardized. Many European labs just classify Preoerythroblasts (=Pronormoblasts - more or less), Macroblasts and Normoblasts.
• BM; BON; Bone marrow; Cell; Cellularity; HEMATOLOGY/CELL COUNTS; Manl; MAR; Marrow (bone); minimal angle of resolution; Minimum angle of resolution; Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Frequently asked questions