Ordering Recommendation

Determine composition of calculi.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Calculus specimen.

Specimen Preparation

Air-dry calculi and transfer to an ARUP Standard Transport Tube. Larger calculi specimens may be transferred to a clean, empty urine cup (150 mL) or similar container.

Storage/Transport Temperature

Room temperature. Also acceptable: Frozen or refrigerated.

Unacceptable Conditions

Any collection or shipping container with a needle attached.


Calculi specimens transported in liquid or contaminated with blood require special handling which will delay analysis.  Specimens that are wrapped in tape or embedded in wax will delay or prevent analysis and should not be submitted.


Ambient: Indefinitely; Refrigerated: Indefitnitely; Frozen: Indefinitely


Quantitative Reflectance Fourier Transform Infrared Spectroscopy/Quantitative Polarizing Microscopy




1-4 days

Reference Interval

By report

Interpretive Data

Calculi are the products of physiological processes that yield crystalline compounds in a matrix of biological compounds and blood.  Matrix components are not reported. The clinically significant crystalline components identified in calculi specimens are reported.  Gross description may not be consistant with the composition determined by FTIR analysis.

Compliance Category



Calculi samples that are transported in liquid and received wet or bloody will be dried for 48-72 hours prior to analysis.

Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
0020520 Calculi Mass 3154-2
0093366 Calculi Description 14618-3
0099294 Calculi Composition 9795-6
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


  • Bile Stone
  • Calculus (Stone) Analysis
  • Calculus Analysis
  • Kidney Stone
  • Prostatic Stones
  • Renal Calculi
  • Renal Stone
  • Stone
  • Urinary Calculi
  • Urinary Stone Analysis
  • Urinary Tract Stone
Calculi (Stone) Analysis