LOINCActiveObservation

LOINC Code 53811-6: Triple phosphate (24H U) [Saturation fraction]

53811-6 is a LOINC code used to identify Triple phosphate (24H U) [Saturation fraction] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Triple phosphate. It is commonly used with the system or sample type Urine.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

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 Triple phosphate. 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

  • Triple phosphate [Saturation Fraction] in 24 hour Urine
  • Triple phosphate
  • 1 day; 24 hours; 24HR; Chemistry; i Phos; Inorganic phosphate; Kidney; Magnesium ammonium phosphate; Nephrology; Percent; Phos; Phosphate total; Phosphorous; Phosphorus; Phosphrous; Pi; PO4; QNT; Quan; Quant; Quantitative; Relative Supersaturation; Renal; RS; Saturation Fraction; Tri; Trip; Tri-Phos; 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

Triple phosphate (24H U) [Saturation fraction]Triple phosphate [Saturation Fraction] in 24 hour UrineTri-Phos 24h SatFr UrTriple phosphateCHEMTriple phosphate, UrineSatFr

Frequently asked questions

Code details

Code53811-6
SystemLOINC
Display nameTriple phosphate (24H U) [Saturation fraction]
DescriptionTriple phosphate
Short nameTri-Phos 24h SatFr Ur
ComponentTriple phosphate
PropertySatFr
Timing24H
System (specimen)Urine
ScaleQn
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.26
Last changed2.73

Consumer names

Triple phosphate, Urine

Part names

Triple phosphateSatFr24HUrineQnSaturation Fraction24 hours

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 53811-6 | HealthAssure