LOINC Code 53420-6: Fibroblast growth factor 23.intact 2nd specimen post Unsp challenge IA (P) [Mass/Vol]

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 Fibroblast growth factor 23.intact ^2nd specimen post XXX challenge. It is commonly used with the system or sample type Plas.

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: IA

What it does not mean

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

Key facts

• Fibroblast growth factor 23.intact [Mass/volume] in Plasma by Immunoassay --2nd specimen post XXX challenge
• Fibroblast growth factor 23.intact ^2nd specimen post XXX challenge
• After; Autosomal dominant hypophosphatemic rickets; CHEMISTRY.CHALLENGE TESTING; Convalescent; EIA; ELFA; ELISA; Enzyme immunoassay; Fac; Fact; Familial tumoral calcinosis with hyperphosphatemia; FGF 23; FGF23; FGF-23; FGF-23.intact; IAA; iFGF23; Level; Mass concentration; MEIA; p chal; Pl; Plasma; Plsm; Point in time; Post immunization; PST; QNT; Quan; Quant; Quantitative; Random; Second; sp2; sp2 p chal; Spec; SUDS

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