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

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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