ICD-10 Diagnosis Code N12

Tubulo-interstitial nephritis, not spcf as acute or chronic

Diagnosis Code N12

ICD-10: N12
Short Description: Tubulo-interstitial nephritis, not spcf as acute or chronic
Long Description: Tubulo-interstitial nephritis, not specified as acute or chronic
This is the 2017 version of the ICD-10-CM diagnosis code N12

Code Classification
  • Diseases of the genitourinary system
    • Renal tubulo-interstitial diseases (N10-N16)
      • Tubulo-interstitial nephritis, not spcf as acute or chronic (N12)

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code N12 is grouped in the following Diagnostic Related Group(s) (MS-DRG v33.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Acute interstitial nephritis
  • Anti-glomerular basement membrane tubulointerstitial nephritis
  • Diffuse pyelonephritis
  • Familial interstitial nephritis
  • Granulomatous interstitial nephritis
  • Idiopathic granulomatous interstitial nephropathy
  • Idiopathic interstitial nephritis
  • Immunologic mediated tubulointerstitial nephritis
  • Interstitial nephritis
  • Mycoplasmal pyelonephritis
  • Primary tubulointerstitial nephritis
  • Pyelitis
  • Pyelonephritis
  • Renal tubulo-interstitial disorders in blood diseases and disorders involving the immune mechanism
  • Secondary tubulointerstitial nephritis
  • Subacute pyelonephritis
  • Tubulointerstitial nephritis
  • Tubulointerstitial nephritis with uveitis syndrome

Index of Diseases and Injuries
References found for the code N12 in the Index of Diseases and Injuries:

Information for Patients

Kidney Diseases

Also called: Renal disease

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.

Most kidney diseases attack the nephrons. This damage may leave kidneys unable to remove wastes. Causes can include genetic problems, injuries, or medicines. You have a higher risk of kidney disease if you have diabetes, high blood pressure, or a close family member with kidney disease. Chronic kidney disease damages the nephrons slowly over several years. Other kidney problems include

  • Cancer
  • Cysts
  • Stones
  • Infections

Your doctor can do blood and urine tests to check if you have kidney disease. If your kidneys fail, you will need dialysis or a kidney transplant.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • ACE inhibitors
  • Acute nephritic syndrome
  • Analgesic nephropathy
  • Atheroembolic renal disease
  • Bartter syndrome
  • Bilateral hydronephrosis
  • Congenital nephrotic syndrome
  • Distal renal tubular acidosis
  • Focal segmental glomerulosclerosis
  • Glomerulonephritis
  • Goodpasture syndrome
  • IgA nephropathy
  • Injury - kidney and ureter
  • Interstitial nephritis
  • Kidney removal
  • Kidney removal - discharge
  • Medicines and Kidney Disease - NIH (National Kidney Disease Education Program)
  • Membranoproliferative GN I
  • Membranous nephropathy
  • Minimal change disease
  • Nephrocalcinosis
  • Nephrotic syndrome
  • Obstructive uropathy
  • Perirenal abscess
  • Proximal renal tubular acidosis
  • Reflux nephropathy
  • Renal papillary necrosis
  • Renal perfusion scintiscan
  • Renal vein thrombosis
  • Unilateral hydronephrosis

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