N16

ICD-10Billable

Renal tubulo-interstitial disord in diseases classd elswhr

Official ICD-10-CM descriptor (FY2026)

Renal tubulo-interstitial disorders in diseases classified elsewhere

N16 is valid for submission on a claim — CMS flags it as a billable, specific code.

Inclusion terms

  • Pyelonephritis
  • Tubulo-interstitial nephritis

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • diphtheritic pyelonephritis and tubulo-interstitial nephritis (A36.84)
  • pyelonephritis and tubulo-interstitial nephritis in candidiasis (B37.49)
  • pyelonephritis and tubulo-interstitial nephritis in cystinosis (E72.04)
  • pyelonephritis and tubulo-interstitial nephritis in salmonella infection (A02.25)
  • pyelonephritis and tubulo-interstitial nephritis in sarcoidosis (D86.84)
  • pyelonephritis and tubulo-interstitial nephritis in Sjogren syndrome (M35.04)
  • pyelonephritis and tubulo-interstitial nephritis in systemic lupus erythematosus (M32.15)
  • pyelonephritis and tubulo-interstitial nephritis in toxoplasmosis (B58.83)
  • renal tubular degeneration in diabetes (E08-E13 with .29)
  • syphilitic pyelonephritis and tubulo-interstitial nephritis (A52.75)

Code first

Sequence the underlying condition before this code.

  • underlying disease, such as:
  • brucellosis (A23.0-A23.9)
  • cryoglobulinemia (D89.1)
  • glycogen storage disease (E74.0-)
  • leukemia (C91-C95)
  • lymphoma (C81.0-C85.9, C96.0-C96.9)
  • multiple myeloma (C90.0-)
  • sepsis (A40.0-A41.9)
  • Wilson's disease (E83.01)

Where this code sits

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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