All ICD10 Codes

N11

Non-Billable
ChapterN00–N99
Rankcategory
Official Description

Chronic tubulo-interstitial nephritis

Use a more specific code (4 billable)
N11.0Nonobstructive reflux-associated chronic pyelonephritisN11.1Chronic obstructive pyelonephritisN11.8Other chronic tubulo-interstitial nephritisN11.9Chronic tubulo-interstitial nephritis, unspecified
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 14: Diseases of the Genitourinary System (N00-N99).

CH14 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

N10-N16 Parent Instructions

Includes
  • pyelonephritis
Excludes1(Not coded here. Use a different code.)
  • pyeloureteritis cystica (N28.85)

Instructional Notes

Includes
  • chronic infectious interstitial nephritis
  • chronic pyelitis
  • chronic pyelonephritis
Use Additional Code
  • code (B95-B97), to identify infectious agent.

Clinical Hierarchy

BillableHas subcodes
CH14Diseases of the genitourinary system (N00-N99)
N10-N16Renal tubulo-interstitial diseases (N10-N16)
N11Chronic tubulo-interstitial nephritisNot billable
N11.0Nonobstructive reflux-associated chronic pyelonephritisBillable
N11.1Chronic obstructive pyelonephritisBillable
N11.8Other chronic tubulo-interstitial nephritisBillable
N11.9Chronic tubulo-interstitial nephritis, unspecifiedBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to N11:

blockN10-N16
Renal tubulo-interstitial diseases (N10-N16)
View context instructions
chapterCH14
Diseases of the genitourinary system (N00-N99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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