Renal tubulo-interstitial diseases (N10-N16) ICD-10-CM
The N10–N16 section covers renal tubulo-interstitial diseases with 44 ICD-10-CM diagnosis codes, of which 35 are billable in fiscal year 2026. The section is organized into the 7 code ranges listed below.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- pyelonephritis
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- pyeloureteritis cystica N28.85
Code Ranges in This Section 7 ranges · 44 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the N10–N16 Code Range
ICD-10 codes N10-N16 cover diseases affecting the kidney’s tubules and surrounding interstitial tissue, including acute and chronic pyelonephritis, obstructive uropathies, drug-induced nephropathies, and renal disorders linked with other diseases. These codes are used to specify detailed diagnoses for tubulo-interstitial kidney conditions.
This code range includes N10 for acute pyelonephritis, also known as acute tubulo-interstitial nephritis or emphysematous pyelonephritis, covering various infectious or immunologic acute kidney inflammations. Chronic forms are coded under N11, such as reflux-associated or obstructive chronic pyelonephritis. Obstructive and reflux uropathies, like hydronephrosis due to ureteral blockages (N13 codes), cover conditions causing urinary tract obstruction or vesicoureteral reflux, which may lead to renal damage. Drug- and heavy-metal-induced nephropathies (N14) identify kidney disorders from substances like analgesics, contrast media, or heavy metals. Other specific or unspecified tubulo-interstitial disorders, as well as those related to systemic diseases like Immunoglobulin G4-related kidney disease, fall under N15 and N16. These detailed codes assist clinicians and coders in accurately documenting the diverse tubulo-interstitial kidney diseases encountered in practice.
Questions About This Page
How many codes are in the N10-N16 range?
The N10-N16 range contains 44 ICD-10-CM diagnosis codes in FY 2026. 35 of them are billable, and the rest are category headers that organize the section.
What conditions does N10-N16 cover?
The range covers renal tubulo-interstitial diseases. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
