Renal tubulo-interstitial diseases (N10-N16)
chapter 14: Diseases of the Genitourinary System
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Instructional notes
Includes: conditions that are coded here
- pyelonephritis
Excludes1: not coded here, use a different code
- pyeloureteritis cystica (N28.85)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers chronic kidney disease staging, CKD in kidney transplant patients, and sequencing CKD with related conditions such as diabetes and hypertension.
- Chronic kidney disease (page 62)
All codes under N10-N16
N10-N16 can't be used on a claim. Pick a billable code below; grey headings group them.
- N10Acute pyelonephritis
- N11Chronic tubulo-interstitial nephritis
- N11.0Nonobstructive reflux-associated chronic pyelonephritis
- N11.1Chronic obstructive pyelonephritis
- N11.8Other chronic tubulo-interstitial nephritis
- N11.9Chronic tubulo-interstitial nephritis, unspecified
- N12Tubulo-interstitial nephritis, not specified as acute or chronic
- N13Obstructive and reflux uropathy
- N13.0Hydronephrosis with ureteropelvic junction obstruction
- N13.1Hydronephrosis with ureteral stricture, not elsewhere classified
- N13.2Hydronephrosis with renal and ureteral calculous obstruction
- N13.3Other and unspecified hydronephrosis
- N13.30Unspecified hydronephrosis
- N13.39Other hydronephrosis
- N13.4Hydroureter
- N13.5Crossing vessel and stricture of ureter without hydronephrosis
- N13.6Pyonephrosis
- N13.7Vesicoureteral-reflux
- N13.70Vesicoureteral-reflux, unspecified
- N13.71Vesicoureteral-reflux without reflux nephropathy
- N13.72Vesicoureteral-reflux with reflux nephropathy without hydroureter
- N13.721Vesicoureteral-reflux with reflux nephropathy without hydroureter, unilateral
- N13.722Vesicoureteral-reflux with reflux nephropathy without hydroureter, bilateral
- N13.729Vesicoureteral-reflux with reflux nephropathy without hydroureter, unspecified
- N13.73Vesicoureteral-reflux with reflux nephropathy with hydroureter
- N13.731Vesicoureteral-reflux with reflux nephropathy with hydroureter, unilateral
- N13.732Vesicoureteral-reflux with reflux nephropathy with hydroureter, bilateral
- N13.739Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified
- N13.8Other obstructive and reflux uropathy
- N13.9Obstructive and reflux uropathy, unspecified
- N14Drug- and heavy-metal-induced tubulo-interstitial and tubular conditions
- N14.0Analgesic nephropathy
- N14.1Nephropathy induced by other drugs, medicaments and biological substances
- N14.11Contrast-induced nephropathy
- N14.19Nephropathy induced by other drugs, medicaments and biological substances
- N14.2Nephropathy induced by unspecified drug, medicament or biological substance
- N14.3Nephropathy induced by heavy metals
- N14.4Toxic nephropathy, not elsewhere classified
- N15Other renal tubulo-interstitial diseases
- N15.0Balkan nephropathy
- N15.1Renal and perinephric abscess
- N15.8Other specified renal tubulo-interstitial diseases
- N15.9Renal tubulo-interstitial disease, unspecified
- N16Renal tubulo-interstitial disorders in diseases classified elsewhere
N10-N16 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Kidney Diseases
You have two kidneys, each about the size of your fist. They are near the middle of your back, just below the rib cage. Inside each kidney there are about a million tiny structures called nephrons. They filter your blood. They remove wastes and extra water, which become urine. The urine flows through tubes called ureters. It goes to your bladder, which stores the urine until you go to the bathroom.
Read more about kidney diseases on MedlinePlus