Includes:

  • pyelonephritis

Excludes1

  • pyeloureteritis cystica (N28.85)
  1. N11 Chronic tubulo-interstitial nephritis

    Use Additional code (B95-B97), to identify infectious agent.

    Includes:

    • chronic infectious interstitial nephritis
    • chronic pyelitis
    • chronic pyelonephritis
    1. N11.0 Nonobstructive reflux-associated chronic pyelonephritis

      Inclusion term(s):

      • Pyelonephritis (chronic) associated with (vesicoureteral) reflux
    2. N11.1 Chronic obstructive pyelonephritis

      Inclusion term(s):

      • 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
    3. N11.8 Other chronic tubulo-interstitial nephritis

      Inclusion term(s):

      • Nonobstructive chronic pyelonephritis NOS
    4. N11.9 Chronic tubulo-interstitial nephritis, unspecified

      Inclusion term(s):

      • Chronic interstitial nephritis NOS
      • Chronic pyelitis NOS
      • Chronic pyelonephritis NOS
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.