N12
BillableTubulo-interstitial nephritis, not specified as acute or chronic
N12 is the ICD-10-CM code for Tubulo-interstitial nephritis, not specified as acute or chronic. It is a billable, specific code valid for reimbursement.
- Status
- Billable
- Chapter
- N00-N99
- Edition
- FY2026
N00-N99 Diseases of the genitourinary system
What this means — in plain language
MedlinePlus · NIHYou 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…
Read more about Kidney Diseases at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •Interstitial nephritis NOS
- •Pyelitis NOS
- •Pyelonephritis NOS
Excludes1 — not coded here
- •calculous pyelonephritis (N20.9)
Frequently asked questions
- What is ICD-10 code N12?
- N12 is the ICD-10-CM code for "Tubulo-interstitial nephritis, not specified as acute or chronic". It falls under N00-N99 Diseases of the genitourinary system.
- Is N12 a billable code?
- Yes — N12 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from N12?
- Excludes1 (not coded here): calculous pyelonephritis (N20.9).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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