N11.0

Nonobstructive reflux-associated chronic pyelonephritis

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 10 never code together

Excludes1

Excludes1

Excludes2

certain conditions originating in the perinatal period (P04-P96)P04-P96
certain infectious and parasitic diseases (A00-B99)A00-B99
complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
neoplasms (C00-D49)C00-D49
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 6

N11code

Includes

Use additional code

Inclusion terms

Includes

Index entries leading here 3

Pyelonephritis — see also Nephritis, tubulo-interstitial
- chronic N11.9
  - nonobstructive N11.8
    - with reflux (vesicoureteral) N11.0
- nonobstructive N12
  - with reflux (vesicoureteral) N11.0
Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) N05.9
- tubulo-interstitial (in) N12
  - chronic (infectious) N11.9
    - nonobstructive N11.8
      - reflux-associated N11.0
Reflux K21.9
- vesicoureteral (with scarring) N13.70
  - with
    - pyelonephritis (chronic) N11.0

Alongside this code 3 same parent — N11

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

Present FY2024–FY2027.