LOINC Code 81757-7: Lymphocyte proliferation.Interleukin 2.maximum/CD3 FC (Bld)

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 Lymphocyte proliferation.Interleukin 2.maximum/CD3. 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: Flow cytometry

What it does not mean

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

Key facts

• Lymphocyte proliferation.Interleukin 2.maximum/CD3 in Blood by Flow cytometry (FC)
• Lymphocyte proliferation.Interleukin 2.maximum/CD3
• The percent of proliferating lymphocytes stimulated by exogenous interleukin-2 (IL-2) out of the total CD3+ T-cells. The maximum (highest proliferating out of 3 titrations) response to IL-2 is reported. This is a second-level test for assessing lymphocyte (T-cell) function after lymphocyte proliferation to phytohemagglutinin has been assessed. The test is used to evaluate patients with impairment in cellular immunity due to primary or secondary immunodeficiencies and in patients receiving immunosuppressive or immunomodulatory therapy.
• Blood; Costimulator; Dynamic; FC; HEMATOLOGY/CELL COUNTS; II; IL; IL2; IL-2; Leu4; Leu-4; LPA; LPT; LPT IL-2 max; LST; Lymphocyte antigen proliferation; Lymphocyte antigen stimulation; Lymphocyte Mitogenic Factor; Number fraction; Percent; PHA; Point in time; QNT; Quan; Quant; Quantitative; Random; T3; T-Cell Growth Factor; T-Cell Stimulating Factor; TCGF; Thymocyte Stimulating Factor; 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