LOINC Code 13929-5: Rheumatoid factor Sheep Cell Agglutination (Syn fld) [Titer]

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 Rheumatoid factor. It is commonly used with the system or sample type Synv 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: Both
• Method: Sheep cell aggl

What it does not mean

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

Key facts

• Rheumatoid factor [Titer] in Synovial fluid by Sheep Cell Agglutination
• Rheumatoid factor
• Agg; Agglut; Agglutination; Dilution factor; Dilution Factor (Titer); Fac; Fact; Joint aspirate; Joint fld; Joint flu; Joint fluid; Point in time; Random; RF; Serology; SF; Shp Aggl; SmQn; Snv; Syn; Syn fl; Synov; Synovial fluid; Titer; Titered; Titre; Ttr

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