All ICD10 Codes
N12Billable

Tubulo-interstitial nephritis, not specified as acute or chronic

Diseases of the Genitourinary System·Renal tubulo-interstitial diseases (N10-N16)·category·FY 2026

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
  • Interstitial nephritis NOS
  • Pyelitis NOS
  • Pyelonephritis NOS
Excludes1(Not coded here. Use a different code.)
  • calculous pyelonephritis (N20.9)

Clinical Hierarchy

BillableHas subcodes
CH14Diseases of the genitourinary system (N00-N99)
N10-N16Renal tubulo-interstitial diseases (N10-N16)
N12Tubulo-interstitial nephritis, not specified as acute or chronicBillable

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 689
Kidney and Urinary Tract Infections with MCC
DRG 690
Kidney and Urinary Tract Infections without MCC
DRG 791
Prematurity with Major Problems
DRG 793
Full Term Neonate with Major Problems