N11.1

Billable

Chronic obstructive pyelonephritis

N11.1 is the ICD-10-CM code for Chronic obstructive pyelonephritis. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
N00-N99
Parent
N11
Edition
FY2026

N00-N99 Diseases of the genitourinary system

What this means — in plain language

MedlinePlus · NIH

The urinary system is the body's drainage system for removing wastes and extra water. It includes two kidneys, two ureters, a bladder, and a urethra. Urinary tract infections (UTIs) are the second most common type of infection in the body. You may have a UTI if you notice: Pain or burning when you urinate Fever, tiredness, or shakiness An urge to urinate often Pressure in your lower belly Urine that smells bad or…

Read more about Urinary Tract Infections at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Includes

  • Pyelonephritis (chronic) associated with anomaly of pelviureteric junction
  • Pyelonephritis (chronic) associated with anomaly of pyeloureteric junction
  • Pyelonephritis (chronic) associated with crossing of vessel
  • Pyelonephritis (chronic) associated with kinking of ureter
  • Pyelonephritis (chronic) associated with obstruction of ureter
  • Pyelonephritis (chronic) associated with stricture of pelviureteric junction
  • Pyelonephritis (chronic) associated with stricture of ureter

Excludes1 — not coded here

  • calculous pyelonephritis (N20.9)
  • obstructive uropathy (N13.-)

Frequently asked questions

What is ICD-10 code N11.1?
N11.1 is the ICD-10-CM code for "Chronic obstructive pyelonephritis". It falls under N00-N99 Diseases of the genitourinary system.
Is N11.1 a billable code?
Yes — N11.1 is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from N11.1?
Excludes1 (not coded here): calculous pyelonephritis (N20.9); obstructive uropathy (N13.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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