2025 CPT code 82370
(Active) Effective Date: N/A Revision Date: N/A Laboratory - Chemistry Procedures Pathology and Laboratory Procedures Feed
Analysis of calculus composition using X-ray diffraction.
Modifiers may apply depending on the circumstances of service.Consult CPT guidelines for appropriate modifier usage.
Medical necessity for this test is established when there is a clinical indication for determining the composition of a calculus (e.g., symptoms suggestive of nephrolithiasis, cholelithiasis, or other urolithiasis). The results directly influence treatment decisions and preventative measures.
The clinical responsibility lies with the laboratory analyst who performs the X-ray diffraction analysis and interprets the results to determine the calculus composition. This information is then reported to the ordering physician for clinical decision-making.
In simple words: The lab tests a kidney stone (or similar stone) using X-rays to find out what it's made of. This helps doctors understand the cause of the stone and recommend treatment.
This CPT code encompasses the laboratory analysis of a calculus (stone) using X-ray diffraction to determine its composition.The calculus may originate from the renal, ureteral, bladder, or gallbladder systems.Common components identified include calcium, carbonate, cystine, magnesium, oxalate, phosphates, urates, and xanthine. The procedure involves projecting a beam of X-rays through the calculus onto a sensitive film to produce a diffraction pattern, which is then analyzed to determine the composition.
Example 1: A patient presents with symptoms of kidney stones.A stone is retrieved, and this test is ordered to determine its composition to guide treatment (e.g., medical management versus surgery, specific medications to prevent recurrence)., A patient undergoes a cholecystectomy (gallbladder removal), and a gallstone is sent for analysis to determine its composition to aid in future preventative strategies., A patient with a history of recurrent urinary stones has a new stone analyzed to see if the composition has changed, informing decisions on long-term management and potential dietary modifications.
* Patient demographics and identifying information.* Detailed history of presenting symptoms.* Information on the source of the calculus (e.g., kidney, ureter, bladder, gallbladder).*Complete description of the calculus (e.g., size, shape, color).* X-ray diffraction analysis report with detailed composition.* Physician's order for the test.
** The code 82370 applies specifically to the X-ray diffraction analysis of calculi. Other methods for analyzing calculus composition (e.g., chemical analysis) would be coded using different CPT codes.This test is commonly performed in a clinical laboratory setting.
- Revenue Code: T1H (LAB TESTS - OTHER (NON-MEDICARE FEE SCHEDULE))
- Payment Status: Active
- Specialties:Urology, Nephrology, Gastroenterology, Pathology
- Place of Service:Office, Hospital, Laboratory