LOINC Code 42673-4: Calcium hydrogen phosphate dihydrate (24H U) [Saturation fraction]

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 Calcium hydrogen phosphate dihydrate. It is commonly used with the system or sample type Urine.

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

• Calcium hydrogen phosphate dihydrate [Saturation Fraction] in 24 hour Urine
• Calcium hydrogen phosphate dihydrate
• 1 day; 24 hours; 24HR; Brushite; Ca; Ca H2 Phos dihyd; Cal; Chemistry; CHPD; H2; Hyd; i Phos; Inorganic phosphate; Kidney; Nephrology; Percent; Phos; Phosphate total; Phosphorous; Phosphorus; Phosphrous; Pi; PO4; QNT; Quan; Quant; Quantitative; Relative Supersaturation; Renal; RS; Saturation Fraction; UA; UR; Urn

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