D86.84 vs N16
D86.84 (Sarcoid pyelonephritis) compared with N16 (Renal tubulo-interstitial disorders in diseases classified elsewhere), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. N16 carries an Excludes1 note covering D86.84: “pyelonephritis and tubulo-interstitial nephritis in sarcoidosis (D86.84)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| D86.84Sarcoid pyelonephritis | N16Renal tubulo-interstitial disorders in diseases classified elsewhere | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | D50-D89 — Diseases of the Blood and Blood-forming Organs and Certain Disorders Involving the Immune Mechanism (D50-D89) | N00-N99 — Diseases of the Genitourinary System (N00-N99) |
| Definition | Sarcoid pyelonephritis is a billable ICD-10-CM diagnosis code (D86.84). | Renal tubulo-interstitial disorders in diseases classified elsewhere is a billable ICD-10-CM diagnosis code (N16). |
| Includes | defects in the complement system immunodeficiency disorders, except human immunodeficiency virus [HIV] disease sarcoidosis Tubulo-interstitial nephropathy in sarcoidosis | pyelonephritis Pyelonephritis Tubulo-interstitial nephritis |
| Code first | — | underlying disease, such as: brucellosis (A23.0-A23.9) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources