LOINC Code 33409-4: Variant lymphocytes/Leukocytes (Pericard fld)

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 Lymphocytes.variant/Leukocytes. It is commonly used with the system or sample type Pericard fld.

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

• Variant lymphocytes/Leukocytes in Pericardial fluid
• Lymphocytes.variant/Leukocytes
• CLSI (formerly NCCLS) document "Reference Leukocyte Differential Count (Proportional) and Evaluation of Instrumental Methods", 1992, recommend the use of variant lymphocytes rather than atypical or reactive lymphocytes.
• Atypical lymphocytes; Cardio; Cardiology; Heart Disease; HEMATOLOGY/CELL COUNTS; Leuc; Leuk; Leukocyte; Lkcs; Lymp; Lymph; Lympho; Lymphocyte; Lymphs; Lymphs%; Number fraction; Pcar; Percent; Pericardial fluid; Point in time; QNT; Quan; Quant; Quantitative; Random; Reactive lymphocytes; Variant lymphocytes; Variant Lymphs; WBC; WBCs; White blood cell; White blood cells

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