LOINC Code 40664-5: Pyrophosphate crystals Ql (Body 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 Pyrophosphate crystals. It is commonly used with the system or sample type Body 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

• Pyrophosphate crystals [Presence] in Body fluid
• Pyrophosphate crystals
• B/F; BF; bod; Bodies; Body fluid; Body fluid, unsp; Crys; Cryst; Crystal; Fl; Fld; FLU; Fluid; HEMATOLOGY/CELL COUNTS; Ordinal; Point in time; PR; Pyrophos Cry; Ql; Qual; Qualitative; Random; Screen

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