ICD-10-CM Alphabetic Index · FY 2026 19 Entries
Hydronephrosis NEC in the ICD-10-CM Index ICD-10-CM
The main term Hydronephrosis (atrophic) (early) (functionless) (intermittent) (primary) (secondary) NEC carries 19 index entries pointing to 9 ICD-10-CM codes. The default entry is N13.30, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
19
Index Entries
9
Codes Referenced
N13.30
Default Code
H
Letter
19 of 19 shown
ICD-10-CM
Index Entries Under Hydronephrosis NEC 19 entries · 9 codes
Hydronephrosis (atrophic) (early) (functionless) (intermittent) (primary) (secondary) NEC N13.30
with
infection N13.6
obstruction (by) (of)
renal calculus N13.2
with infection N13.6
ureteral NEC N13.1
with infection N13.6
calculus N13.2
with infection N13.6
ureteropelvic junction (congenital) Q62.11
acquired N13.0
with infection N13.6
ureteral stricture NEC N13.1
with infection N13.6
congenital Q62.0
due to acquired occlusion of ureteropelvic junction N13.0
specified type NEC N13.39
tuberculous A18.11
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
