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.

LOINCActiveObservation

LOINC Code 32159-6: Carbonated calcium phosphate (Stone) [Mass fraction]

Name: LOINC Code 32159-6: Carbonated calcium phosphate (Stone) [Mass fraction]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:18.899Z

32159-6 is a LOINC code used to identify Carbonated calcium 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 Carbonated calcium 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 Carbonated calcium 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: Observation

What it does not mean

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

Key facts

Carbonated calcium phosphate/Total in Stone
Carbonated calcium phosphate/Total
Ca; Ca Phos; Ca10(PO4-CO3OH)6(OH)2; Cal; Calc; Calcium carbapatite; Calculi; CAP; Carb Ca Phos; Carbonate apatite; Chemistry; Gastro; Gastroenterology; GI; i Phos; Inorganic phosphate; Kidney; Mass Fraction; Nephrology; Percent; Phos; Phosphate total; Phosphorous; Phosphorus; Phosphrous; Pi; PO4; Point in time; QNT; Quan; Quant; Quantitative; Random; Renal; Stn; Stone; Stones; Tot; Totl

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

Carbonated calcium phosphate (Stone) [Mass fraction]Carbonated calcium phosphate/Total in StoneCarb Ca Phos MFr StoneCarbonated calcium phosphate/TotalCHEMCarbonated calcium phosphate, StoneMFr

Frequently asked questions

Code details

Code32159-6

SystemLOINC

Display nameCarbonated calcium phosphate (Stone) [Mass fraction]

DescriptionCarbonated calcium phosphate/Total

Short nameCarb Ca Phos MFr Stone

ComponentCarbonated calcium phosphate/Total

PropertyMFr

TimingPt

System (specimen)Calculus

ScaleQn

ClassCHEM

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.07

Last changed2.44

Consumer names

Carbonated calcium phosphate, Stone

Part names

Carbonated calcium 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.