Short answer · Medically reviewed summary · Last updated: 2026-05-08
The primary ICD-10 code for kidney stones (nephrolithiasis) is N20.0 (calculus of kidney), while the legacy ICD-9 code most commonly used for this condition is 592.0. These codes are essential for medical billing and clinical documentation when a patient is diagnosed with symptomatic kidney stones. What clinical codes are used for kidney stones? When healthcare providers document kidney stones, they utilize the International Classification of Diseases (ICD) system to standardize reporting.
ICD10 code of kidney stones and ICD9 code
ICD-10 and ICD-9 codes for kidney stones, with classification details for clinicians, coders and patients.
The primary ICD-10 code for kidney stones (nephrolithiasis) is N20.0 (calculus of kidney), while the legacy ICD-9 code most commonly used for this condition is 592.0. These codes are essential for medical billing and clinical documentation when a patient is diagnosed with symptomatic kidney stones.
What clinical codes are used for kidney stones?
When healthcare providers document kidney stones, they utilize the International Classification of Diseases (ICD) system to standardize reporting. While ICD-10 code N20.0 is the standard for a calculus of the kidney, other codes may apply depending on the location of the stone, such as N20.1 for calculus of the ureter or N20.2 for calculus of the kidney with calculus of the ureter. Historically, under the ICD-9 system, 592.0 was the primary identifier for kidney stones.
How are kidney stones typically diagnosed?
Diagnosis of kidney stones usually involves a combination of clinical evaluation and diagnostic imaging. Because kidney stones often present with severe flank pain and hematuria (bloody urine), physicians prioritize rapid identification. Common diagnostic methods include:
- Non-contrast CT scan: The gold standard for identifying the size and location of kidney stones.
- Urinalysis: To check for blood, infection, or crystal formation.
- Renal ultrasound: Often used in pregnant patients or those where radiation exposure must be minimized.
- Metabolic blood panels: To assess kidney function and calcium/uric acid levels.
What should you do if you suspect you have kidney stones?
If you are experiencing symptoms like intense pelvic or flank pain and bloody urine, it is critical to seek medical attention promptly. Our community at DiseaseMaps.org currently includes 13 members who have navigated the challenges of kidney stones and shared their experiences. Connecting with others can provide emotional support during the painful process of passing kidney stones or recovering from surgical interventions.
Next steps
- Consult a board-certified Urologist for a definitive diagnosis and treatment plan.
- Maintain adequate hydration to assist in the natural passage of smaller kidney stones.
- Join the DiseaseMaps.org community to share experiences with others managing chronic urological conditions.
- Follow up with a metabolic specialist if you have recurrent episodes to determine the chemical composition of your stones.
Medical disclaimer: This information is for educational purposes only and does not constitute professional medical advice, diagnosis, or treatment; always seek the advice of your physician regarding any medical condition.
References
- NIH National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
- ICD-10-CM Official Guidelines for Coding and Reporting
- American Urological Association (AUA) Guidelines on Medical Management of Kidney Stones
- DiseaseMaps.org Patient Community Data
