LOINC Code 55729-8: RBC.fetal/Erythrocytes FC (Bld) [Ratio]

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 Erythrocytes.fetal/Erythrocytes. 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: Both
• Method: Flow cytometry

What it does not mean

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

Key facts

• Erythrocytes.fetal/Erythrocytes [Ratio] in Blood by Flow cytometry (FC)
• Erythrocytes.fetal/Erythrocytes
• The fetal RBC percentage is directly measured by flow cytometry.
• Blood; Discocytes; Dynamic; Erthrocyte; Erythrocyte; FC; Fetal cells; Fetal RBC; HEMATOLOGY/CELL COUNTS; Hemoglobin F-loaded erythrocytes; Point in time; QNT; Quan; Quant; Quantitative; Random; Ratios; RBC; RBCS; Red blood cell; Red blood cells; Red blood corpuscle; Red blood corpusles; Red cell; Red cells; Rto; 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

Frequently asked questions