What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 63550-8: Calcium magnesium phosphate (Stone) [Mass fraction]

Name: LOINC Code 63550-8: Calcium magnesium phosphate (Stone) [Mass fraction]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:42.802Z

63550-8 is a LOINC code used to identify Calcium magnesium phosphate (Stone) [Mass 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 Calcium magnesium phosphate/Total. It is commonly used with the system or sample type Calculus.

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 Calcium magnesium phosphate/Total. It is commonly used with the system or sample type Calculus.

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

Calcium magnesium phosphate/Total in Stone
Calcium magnesium phosphate/Total
Ca; Cal; Calc; Calculi; Chemistry; Gastro; Gastroenterology; GI; i Phos; Inorganic phosphate; Kidney; MAG; Magnes; Mass fraction; Mg; Nephrology; Percent; Phos; Phosphate total; Phosphorous; Phosphorus; Phosphrous; Pi; PO4; Point in time; QNT; Quan; Quant; Quantitative; Random; Renal; Stn; Stone; Stones; Tot; Totl; Whitlockite

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

Calcium magnesium phosphate (Stone) [Mass fraction]Calcium magnesium phosphate/Total in StoneCalcium magnesium phosphate MFr StoneCalcium magnesium phosphate/TotalCHEMCalcium magnesium phosphate, StoneMFr

Frequently asked questions

Code details

Code63550-8

SystemLOINC

Display nameCalcium magnesium phosphate (Stone) [Mass fraction]

DescriptionCalcium magnesium phosphate/Total

Short nameCalcium magnesium phosphate MFr Stone

ComponentCalcium magnesium phosphate/Total

PropertyMFr

TimingPt

System (specimen)Calculus

ScaleQn

ClassCHEM

Example units%

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.38

Last changed2.70

Consumer names

Calcium magnesium phosphate, Stone

Part names

Calcium magnesium phosphate/TotalMFrPtCalculusQnMass fractionPoint in time (spot)Calculus (stone)

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.