LOINC Code 9348-4: pH free acid (Gast 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 pH.free acid. It is commonly used with the system or sample type Gast 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

What it does not mean

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

Key facts

• pH free acid of Gastric fluid
• pH.free acid
• Acd; Acids; Chemistry; FR; GAST; Gastric contents; Gastric fluid; Log molar concentration; Non-protein bound; pH Free Ac; Point in time; Random; SmQn

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