ICD-10-CM Alphabetic Index · FY 2026 13 Entries
Impervious in the ICD-10-CM Index ICD-10-CM
The main term Impervious (congenital) carries 13 index entries pointing to 11 ICD-10-CM codes. 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
13
Index Entries
11
Codes Referenced
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Default Code
I
Letter
13 of 13 shown
ICD-10-CM
Index Entries Under Impervious 13 entries · 11 codes
Impervious (congenital)
anus Q42.3
with fistula Q42.2
bile duct Q44.2
esophagus Q39.0
with tracheoesophageal fistula Q39.1
intestine (small) Q41.9
large Q42.9
specified NEC Q42.8
rectum Q42.1
with fistula Q42.0
ureter see Atresia, ureter
urethra Q64.39
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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.
