Calculi, Urinary With Photograph

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Turnaround Time: 4 - 6 days
CPT Code:


Test Type: Calculi


Determine calculi composition, metabolic factors affecting stone formation, evaluation of patient with nephrolithiasis.

This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the Food and Drug Administration.

In the United States, the incidence of urinary tract calculi is common, with one person in 1000 requiring hospital care and treatment. A typical urinary calculus is composed of crystalline substances precipitated in the body. To ensure proper treatment and prevention of recurrences of urinary calculi, it is critical that the crystalline constituents of the stone be identified. Mandel describes 15 crystalline substances common in urinary calculi and subdivides them into six broad catagories.1,2

1. Mandel NS, Mandel IC, Kolbach-Mandel AM. Accurate stone analysis: the impact on disease diagnosis and treatment. Urolithiasis. 2017 Feb;45(1):3-9. PubMed 27915396

2. Mandel N. Urinary tract calculi. Lab Med. 1986 Aug;17(8):449-458. doi: 10.1093/labmed/17.8.449



Collection Details:

Collection Instructions:

30/50mL clean specimen container or capsule.

Provide source (urinary, gall, salivary) of calculi. Avoid rejection and delayed processing by sending the stone completely dried in a clean container. Do not send gauze, filters, tape or Q-tips. Stones that are not received completely dried will result in delayed processing.

Maintain specimen at room temperature.