Kidney Stone ICD-10-CM Codes | 2025

Which kidney stone ICD codes are billable?

Here's a look at the billability of the most common codes:

• N20.0: Yes, this code is billable as it refers to a specific kidney stone diagnosis, which is kidney calculus.
• N20.2: Yes, this code is billable because it refers to a specific condition in which stones are in both the kidney and ureter.

Clinical information

Kidney stones, or renal calculi, are hard deposits of minerals and salts inside your kidneys. Here is more in-depth clinical information:

• Kidney stones form when urine contains more crystal-forming substances—such as calcium, oxalate, and uric acid, which are waste from filtered blood—than the fluid in urine can dilute. They are often found in the kidney pelvis, which is where urine is collected.
• Symptoms of urinary stones can include severe pain in the side and back, pain during urination, blood in the urine, fever, and nausea or vomiting.
• Dehydration, specific diets, obesity, and certain medical conditions, such as chronic kidney disease, increase the risk of kidney stones.
• Treatment for kidney stones usually depends on the size and location of the stone, the patient's overall health, and whether they are causing pain or obstructing the urinary tract.

Synonyms Include:

• Renal Calculus
• Ureter Stone
• Urolithiasis
• Nephrolith
• Renal Stone