N16
Renal tubulo-interstitial disorders in diseases classified elsewhere
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 19 never code together
N16code
Excludes1
- diphtheritic pyelonephritis and tubulo-interstitial nephritis (A36.84)A36.84A36.84A36.84
- pyelonephritis and tubulo-interstitial nephritis in candidiasis (B37.49)B37.49B37.49B37.49
- pyelonephritis and tubulo-interstitial nephritis in cystinosis (E72.04)E72.04E72.04E72.04
- pyelonephritis and tubulo-interstitial nephritis in salmonella infection (A02.25)A02.25A02.25A02.25
- pyelonephritis and tubulo-interstitial nephritis in sarcoidosis (D86.84)D86.84D86.84D86.84
- pyelonephritis and tubulo-interstitial nephritis in Sjogren syndrome (M35.04)M35.04M35.04M35.04
- pyelonephritis and tubulo-interstitial nephritis in systemic lupus erythematosus (M32.15)M32.15M32.15M32.15
- pyelonephritis and tubulo-interstitial nephritis in toxoplasmosis (B58.83)B58.83B58.83B58.83
- renal tubular degeneration in diabetes (E08-E13 with .29)E08-E13E08-E13E08-E13
- syphilitic pyelonephritis and tubulo-interstitial nephritis (A52.75)A52.75A52.75A52.75
N00-N99chapter
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 12
N16code
Inclusion terms
- Pyelonephritis
- Tubulo-interstitial nephritis
Code first
- underlying disease, such as:
- brucellosis (A23.0-A23.9)A23.0-A23.9A23.0-A23.9A23.0-A23.9
- cryoglobulinemia (D89.1)D89.1D89.1D89.1
- glycogen storage disease (E74.0-)E74.0-E74.0-E74.0-
- leukemia (C91-C95)C91-C95C91-C95C91-C95
- lymphoma (C81.0-C85.9, C96.0-C96.9)C81.0-C85.9C81.0-C85.9C81.0-C85.9C96.0-C96.9C96.0-C96.9C96.0-C96.9
- multiple myeloma (C90.0-)C90.0-C90.0-C90.0-
- sepsis (A40.0-A41.9)A40.0-A41.9A40.0-A41.9A40.0-A41.9
- Wilson's disease (E83.01)E83.01E83.01E83.01
N10-N16block
Includes
- pyelonephritis
Index entries leading here filed at null
No alphabetic index entry points at this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.