LOINC Code 74839-2: CD3-CD4+ cells/Cells (Specimen)

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 Cells.CD3-CD4+/Cells. It is commonly used with the system or sample type XXX.

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

• CD3-CD4+ cells/cells in Specimen
• Cells.CD3-CD4+/Cells
• Lymphocytes and monocytes in T-cell lymphomas & acute lymphocytic leukemia (ALL) will express CD4 without CD3. This test can be done on blood, CSF, tissue, body fluid, bone marrow, and bronchial washing.
• CD3 Cells; CD3+CD4+ Cells; CD4+ T cells; Cell; CELL MARKERS; Cellularity; Helper T cells; Inducer T cells; L3T4; Leu3; Leu-3; Leu4; Leu-4; Misc; Miscellaneous; Number fraction; Other; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Spec; T3; T4; T-4; T4 helper/inducer cells; To be specified in another part of the message; Unspecified; W3/25

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